Grade 2 Solutions

· Fill in the plus tables Solution

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· Plus and minus mixed Solution

3+4=7

5+6=11

7+7=14

8−3=5

12−4=8

15−5=10

6+9=15

11+6=17

9+4=13

14−6=8

16−7=9

19−8=11

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· Euli made a mistake Solution

4+7=11

13−5=7→8

9+6=15

18−9=8→9

5+8=13

14−6=9→8

7+9=16

16−8=9→8

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· Twenty frame: spot it fast Solution

· Magic triangles - sum 12 Solution

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· Find the date in the calendar Solution

1. 8

2. 13

3. 5

4. 15

5. 19

6. 9

· Calculate over ten - addition Solution

7 + 6 = 7 + 3 + 3 = 10 + 3 = 13

8 + 7 = 8 + 2 + 5 = 10 + 5 = 15

9 + 5 = 9 + 1 + 4 = 10 + 4 = 14

6 + 8 = 6 + 4 + 4 = 10 + 4 = 14

8 + 5 = 8 + 2 + 3 = 10 + 3 = 13

9 + 7 = 9 + 1 + 6 = 10 + 6 = 16

7 + 8 = 7 + 3 + 5 = 10 + 5 = 15

6 + 9 = 6 + 4 + 5 = 10 + 5 = 15

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· Bridge over ten - addition Solution

6 + 9: 6 +4 → 10 +5 → 15

7 + 4: 7 +3 → 10 +1 → 11

8 + 8: 8 +2 → 10 +6 → 16

9 + 6: 9 +1 → 10 +5 → 15

5 + 8: 5 +5 → 10 +3 → 13

7 + 8: 7 +3 → 10 +5 → 15

6 + 5: 6 +4 → 10 +1 → 11

9 + 8: 9 +1 → 10 +7 → 17

· Minus table Solution

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· Twenty frame: calculating over ten Solution

9+1+6=16

5+5+4=14

8+2+2=12

7+3+4=14

8+2+3=13

9+1+5=15

· How many are there together? Solution

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· Find the right path! Solution

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· Magic square - sum 15 Solution

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· Squares up to 20 Solution

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· Number wheel - adding Solution

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· Arrow arithmetic Solution

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· Secret wizard writing Solution

🔮 = 9🐉 = 4🗝️ = 7🍄 = 3

🔮+🐉=13

🗝️+🍄=10

🐉+🗝️=11

🔮−🍄=6

🗝️−🐉=3

🔮−🗝️=2

🔮+🍄=12

🗝️+🐉=11

🔮−🐉=5

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· Twenty frame: draw and count Solution

· Escape the dungeon! Solution

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· On the playground Solution

1. 1. 13
2. 2. 8
3. 3. 16
4. 4. 7
5. 5. 13

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· Mixed table (plus and minus) Solution

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· Color the numbers Solution

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· Boss level: review up to 20 Solution

• 8,10,18
• 9,11,20
• 4,6,10,14,19
• 7,4,11,13,17

· Adding whole tens Solution

10+20=30

30+40=70

50+10=60

20+30=50

20+70=90

60+30=90

10+50=60

30+30=60

40+20=60

40+50=90

10+80=90

60+40=100

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· Double in the table Solution

2	5	8	10	12	15
4	10	16	20	24	30

3	6	9	11	14	20
6	12	18	22	28	40

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· Counting in twos Solution

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· Another plus table Solution

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· Magic square - sum 24 Solution

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· Time spans and units Solution

1. 1. 60
2. 2. 24
3. 3. 30
4. 4. 45
5. 5. 7

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· Easy caterpillars Solution

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· Find the secret card Solution

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· How to read the clock Solution

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· Adding ones Solution

30+5=35

40+8=48

50+3=53

60+7=67

70+2=72

80+9=89

20+6=26

90+4=94

10+8=18

50+5=55

30+9=39

70+6=76

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· Double in the table Solution

3	6	9	11	14	18
6	12	18	22	28	36

4	7	10	13	16	19
8	14	20	26	32	38

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· The hundred chart Solution

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· Find the neighbors! Solution

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· Minus table Solution

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· Neighbor problems - clever calculating Solution

1. 1. 13
2. 2. 17
3. 3. 11
4. 4. 15
5. 5. 17

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· In steps of five and ten Solution

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· Sorting numbers Solution

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· The number tree grows Solution

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· Two-digit plus one-digit Solution

23+5=28

34+4=38

51+7=58

42+6=48

65+3=68

78+2=80

16+3=19

87+2=89

64+5=69

53+6=59

71+8=79

92+7=99

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· Halve in the table Solution

4	8	10	14	18	20
2	4	5	7	9	10

6	12	16	22	24	28
3	6	8	11	12	14

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· The wizard and the owl share stars Solution

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· Build up the wall! Solution

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· More plus tables Solution

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· Plus table: the sum of each row on the right Solution

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· With tens Solution

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· Tens in the flower Solution

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· Number wheel - subtracting Solution

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· Nine and eleven more and less Solution

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· Two-digit plus two-digit Solution

74+15=89

53+25=78

81+12=93

45+24=69

67+21=88

32+65=97

62+23=85

41+35=76

58+41=99

43+25=68

84+11=95

36+43=79

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· Double in the table Solution

16	21	25	30	34	40
32	42	50	60	68	80

18	23	27	32	36	44
36	46	54	64	72	88

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· Sorting numbers once more Solution

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O 'clock and half-past times Solution

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· Minus table up to 100 Solution

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· Math stories Solution

1. 1. 46
2. 2. 32
3. 3. 23
4. 4. 75
5. 5. 25

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· Magic square - sum 30 Solution

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· Ingredients for the dungeon pot Solution

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· Calculate with the cards Solution

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· Plus up to 100 - find the result Solution

24+35=59

47+28=75

68+19=87

36+44=80

71+26=97

18+56=74

41+38=79

29+47=76

15+23=38

32+41=73

26+38=64

49+16=65

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· Break into tens and ones Solution

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· Halve in the table Solution

40	50	60	70	80	90
20	25	30	35	40	45

44	54	66	72	86	96
22	27	33	36	43	48

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· Neighbor Numbers Solution

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· Fill in the missing numbers! Solution

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· Complete the hundred chart Solution

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· Compare the numbers Solution

34<43

67=67

89>78

45<54

100>99

23<32

71=71

56<65

80>79

38<83

19<91

64>46

52>25

61<71

77=77

48<84

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· Counting in sevens Solution

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· Add in the golem pyramid Solution

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· Plus up to 100 - what is missing? Solution

27+53=80

34+36=70

18+47=65

42+48=90

55+33=88

23+49=72

36+45=81

49+46=95

12+48=60

25+53=78

31+19=50

44+48=92

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· Rounding to Tens Solution

34≈30

78≈80

52≈50

86≈90

17≈20

65≈70

23≈20

91≈90

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· Double in the table Solution

24	33	38	42	47	50
48	66	76	84	94	100

26	35	39	41	46	49
52	70	78	82	92	98

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· Addition across the ten Solution

38 + 6 = 38 + 2 + 4 = 10 + 4 = 44

47 + 8 = 47 + 3 + 5 = 10 + 5 = 55

69 + 7 = 69 + 1 + 6 = 10 + 6 = 76

85 + 9 = 85 + 5 + 4 = 10 + 4 = 94

26 + 5 = 26 + 4 + 1 = 10 + 1 = 31

57 + 7 = 57 + 3 + 4 = 10 + 4 = 64

74 + 8 = 74 + 6 + 2 = 10 + 2 = 82

63 + 9 = 63 + 7 + 2 = 10 + 2 = 72

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· Color the numbers Solution

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· Double the number! Solution

20+20=40

45+45=90

50+50=100

30+30=60

15+15=30

40+40=80

35+35=70

25+25=50

32+32=64

10+10=20

14+14=28

5+5=10

💡 Help with this task

· Estimating: round first, then work it out in your head Solution

38 + 51 ≈90

74 - 29 ≈50

21 + 48 ≈70

89 - 42 ≈50

56 + 23 ≈80

85 - 38 ≈50

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· How much does this cost altogether? Solution

1. $6

2. $12

3. $11

4. $15

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· Pick the right cards Solution

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· Subtracting whole tens Solution

50−20=30

70−30=40

80−40=40

60−10=50

90−50=40

90−30=60

40−20=20

80−60=20

70−40=30

80−70=10

90−20=70

60−40=20

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· Halve the number! Solution

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· Sharing tens numbers fairly Solution

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· Find the missing numbers! Solution

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· Plus table up to 50 Solution

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· Halve in the table Solution

32	40	48	56	64	70
16	20	24	28	32	35

36	44	52	60	68	72
18	22	26	30	34	36

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· Tricky caterpillars Solution

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· Adding up containers Solution

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· The secret card with minus Solution

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· Subtracting ones Solution

74−3=71

86−5=81

96−4=92

78−6=72

95−2=93

83−3=80

97−1=96

79−7=72

88−2=86

87−5=82

91−1=90

99−8=91

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· Turn the problem around Solution

35 + 20 = 55

55 − 20 = 35

55 − 35 = 20

42 + 18 = 60

60 − 18 = 42

60 − 42 = 18

54 + 23 = 77

77 − 23 = 54

77 − 54 = 23

28 + 45 = 73

73 − 45 = 28

73 − 28 = 45

36 + 27 = 63

63 − 27 = 36

63 − 36 = 27

49 + 31 = 80

80 − 31 = 49

80 − 49 = 31

25 + 14 = 39

39 − 14 = 25

39 − 25 = 14

38 + 26 = 64

64 − 26 = 38

64 − 38 = 26

17 + 52 = 69

69 − 52 = 17

69 − 17 = 52

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· Steps of five Solution

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· Big plus table Solution

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· Breaking numbers apart Solution

47 + 25 =

= 40 + 20 + 7 + 5

= 60 + 12

= 72

38 + 36 =

= 30 + 30 + 8 + 6

= 60 + 14

= 74

54 + 27 =

= 50 + 20 + 4 + 7

= 70 + 11

= 81

63 + 19 =

= 60 + 10 + 3 + 9

= 70 + 12

= 82

73 + 18 =

= 70 + 10 + 3 + 8

= 80 + 11

= 91

46 + 37 =

= 40 + 30 + 6 + 7

= 70 + 13

= 83

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· How much money is here? Solution

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· Which bills and coins do you need? Solution

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· Quarter hours Solution

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· Two-digit minus two-digit Solution

56−23=33

78−34=44

89−45=44

67−32=35

94−51=43

75−42=33

83−61=22

99−36=63

64−21=43

87−43=44

72−30=42

96−55=41

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· What time is it later? Solution

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· Magic triangles with multiples of five Solution

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· Another number tree Solution

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· Shopping Solution

1. 1. 62
2. 2. 45
3. 3. 27
4. 4. 30
5. 5. 28

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· Magic square - sum 45 Solution

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· Playground games Solution

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· Combining shapes and patterns Solution

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· Certain, possible or impossible? Solution

I draw a filled marble.possible

I draw a dotted marble.impossible

I draw a filled or an empty marble.certain

I draw an empty marble.possible

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· Who am I? Solution

• I am bigger than 30.
• I am smaller than 40.
• I am even.
• My ones digit is 4.

Solution: 34

• I am smaller than 60.
• I am bigger than 50.
• I am odd.
• My ones digit is 7.

Solution: 57

• I am a whole ten.
• I am bigger than 50.
• I am smaller than 80.
• Half of me is 35.

Solution: 70

• I am bigger than 80.
• I am smaller than 90.
• I am even.
• My ones digit is 6.

Solution: 86

• I am bigger than 40.
• I am smaller than 50.
• I am even.
• My ones digit is 4.

Solution: 44

• I am a whole ten.
• I am bigger than 80.
• I am smaller than 100.
• Half of me is 45.

Solution: 90

• I am bigger than 70.
• I am smaller than 80.
• I am odd.
• My ones digit is 3.

Solution: 73

• I am bigger than 20.
• I am smaller than 30.
• I am even.
• My ones digit is 8.

Solution: 28

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· Minus up to 100 - find the result Solution

78−25=53

92−47=45

64−38=26

85−29=56

71−26=45

53−18=35

88−49=39

67−39=28

95−42=53

76−31=45

82−55=27

69−24=45

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· Math squares up to 50 Solution

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· Find the way! Solution

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· Which ingredients match the cauldron? Solution

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· Nineteen and twenty-one Solution

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· Tens table: left plus top Solution

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· How many tens, how many ones? Solution

23=

Z	E
2	3

47=

Z	E
4	7

65=

Z	E
6	5

92=

Z	E
9	2

89=

Z	E
8	9

41=

Z	E
4	1

💡 Help with this task

· Wizard writing for beginners Solution

🔮 = 14🔔 = 22🗝️ = 31🍄 = 12

🔮+🔔=36

🗝️+🍄=43

🔔+🗝️=53

🗝️−🍄=19

🔔−🔮=8

🍄+🔮=26

🗝️−🔮=17

🔔+🍄=34

🗝️+🔮=45

💡 Help with this task

· Writing numbers up to 100 Solution

13

24

36

47

58

65

71

82

90

99

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· Color the number on the poles Solution

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· Minus up to 100 - what is missing? Solution

80−45=35

75−47=28

90−43=47

64−45=19

88−35=53

72−36=36

95−47=48

81−54=27

60−35=25

77−45=32

86−35=51

93−49=44

💡 Help with this task

· Twenty-four and twenty-six Solution

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· Build the number from Z and E Solution

Z	E
2	5

= 25

Z	E
4	3

= 43

Z	E
6	9

= 69

Z	E
8	7

= 87

Z	E
3	1

= 31

Z	E
5	4

= 54

Z	E
7	0

= 70

Z	E
9	6

= 96

Z	E
1	8

= 18

Z	E
4	2

= 42

Z	E
6	1

= 61

Z	E
8	4

= 84

Z	E
2	8

= 28

Z	E
5	7

= 57

Z	E
3	6

= 36

Z	E
9	3

= 93

💡 Help with this task

· Putting together Solution

💡 Help with this task

· Numerion turns the number: tens and ones swap Solution

62→26

47→74

35→53

81→18

29→92

56→65

💡 Help with this task

· Numerion bundles the ones Solution

4 tens and 13 ones =53

2 tens and 17 ones =37

5 tens and 11 ones =61

3 tens and 19 ones =49

6 tens and 12 ones =72

1 tens and 18 ones =28

7 tens and 14 ones =84

4 tens and 16 ones =56

💡 Help with this task

· Counting hits in the table Solution

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· Cards up to 100 Solution

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· One is missing - which one? Solution

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· Filling in numbers Solution

💡 Help with this task

· What is missing? Solution

86−32=54

64−23=41

79−43=36

89−34=55

97−35=62

68−41=27

58−45=13

69−52=17

94−23=71

59−16=43

67−42=25

56−35=21

💡 Help with this task

· Compare the calculations Solution

25 + 35>70 − 15

90 − 40<30 + 25

60 + 10=30 + 40

100 − 40=30 + 30

80 − 30>20 + 25

70 − 10>50 + 5

40 + 40<90 − 5

55 + 15=90 − 20

45 + 5=60 − 10

30 + 20<40 + 15

75 − 30=25 + 20

85 − 25>20 + 35

💡 Help with this task

· Find the pattern Solution

💡 Help with this task

· Sort from smallest to largest! Solution

💡 Help with this task

· Rounding to Tens Solution

43≈40

29≈30

94≈90

58≈60

71≈70

85≈90

36≈40

12≈10

💡 Help with this task

· Hundred chart with patterns Solution

💡 Help with this task

· More counting in sevens Solution

💡 Help with this task

· Swap problems in addition Solution

23+45=68↔45+23=68

17+36=53↔36+17=53

30+52=82↔52+30=82

15+28=43↔28+15=43

41+19=60↔19+41=60

26+53=79↔53+26=79

34+48=82↔48+34=82

12+57=69↔57+12=69

💡 Help with this task

· The golem counts up to 100 Solution

💡 Help with this task

· Easy chains Solution

34+40−10=64

50−20+15=45

40+25−30=35

60−35+20=45

30+40−25=45

70−30+12=52

45+20−15=50

80−40+25=65

💡 Help with this task

· Subtraction across the ten Solution

35 − 9 = 35 − 5 − 4 = 10 − 4 = 26

42 − 5 = 42 − 2 − 3 = 10 − 3 = 37

54 − 6 = 54 − 4 − 2 = 10 − 2 = 48

73 − 8 = 73 − 3 − 5 = 10 − 5 = 65

61 − 4 = 61 − 1 − 3 = 10 − 3 = 57

86 − 7 = 86 − 6 − 1 = 10 − 1 = 79

24 − 6 = 24 − 4 − 2 = 10 − 2 = 18

93 − 5 = 93 − 3 − 2 = 10 − 2 = 88

💡 Help with this task

· Continue the number pattern Solution

• 66,68,70
• 87,89,91
• 96,98,100

💡 Help with this task

· Double the number! Solution

26+26=52

18+18=36

23+23=46

35+35=70

33+33=66

27+27=54

31+31=62

42+42=84

48+48=96

13+13=26

17+17=34

21+21=42

💡 Help with this task

· Estimating: which result comes closest? Solution

47 + 32 ≈80

93 - 58 ≈30

19 + 63 ≈80

62 - 27 ≈30

74 + 18 ≈90

66 - 39 ≈30

💡 Help with this task

· Halve the number! Solution

💡 Help with this task

· Tricky sharing Solution

💡 Help with this task

· Tall walls Solution

💡 Help with this task

· Tricky chains Solution

25+18−13=30

42−17+25=50

63+12−35=40

34+28−19=43

50−23+38=65

71−34+13=50

18+45−27=36

89−42+18=65

💡 Help with this task

· Big math square Solution

💡 Help with this task

· How much change? Solution

1. $2

2. $11

3. $1

4. $9

💡 Help with this task

· Long caterpillar Solution

💡 Help with this task

· Two cards, one target Solution

💡 Help with this task

· Number houses Solution

💡 Help with this task

· Halve in the table Solution

44	58	66	78	90	100
22	29	33	39	45	50

46	54	62	80	88	96
23	27	31	40	44	48

💡 Help with this task

· Plus table up to 100 Solution

💡 Help with this task

· Find the reverse Solution

80 − 35 = 45

45 + 35 = 80

35 + 45 = 80

67 − 24 = 43

43 + 24 = 67

24 + 43 = 67

91 − 46 = 45

45 + 46 = 91

46 + 45 = 91

75 − 38 = 37

37 + 38 = 75

38 + 37 = 75

84 − 29 = 55

55 + 29 = 84

29 + 55 = 84

96 − 47 = 49

49 + 47 = 96

47 + 49 = 96

58 − 19 = 39

39 + 19 = 58

19 + 39 = 58

72 − 28 = 44

44 + 28 = 72

28 + 44 = 72

89 − 33 = 56

56 + 33 = 89

33 + 56 = 89

💡 Help with this task

· Three containers together Solution

💡 Help with this task

· Big minus table Solution

💡 Help with this task

· Steps of seven Solution

💡 Help with this task

· Crossing the ten Solution

56 + 38 =

= 50 + 30 + 6 + 8

= 80 + 14

= 94

47 + 29 =

= 40 + 20 + 7 + 9

= 60 + 16

= 76

69 + 24 =

= 60 + 20 + 9 + 4

= 80 + 13

= 93

58 + 27 =

= 50 + 20 + 8 + 7

= 70 + 15

= 85

37 + 46 =

= 30 + 40 + 7 + 6

= 70 + 13

= 83

65 + 27 =

= 60 + 20 + 5 + 7

= 80 + 12

= 92

💡 Help with this task

· Rule houses Solution

💡 Help with this task

· Dollars before the point, cents after Solution

1. $3 and 78¢

2. $2 and 67¢

3. $4 and 74¢

4. $5 and 89¢

💡 Help with this task

· Counting lots of money Solution

💡 Help with this task

· Make the amounts Solution

💡 Help with this task

· Prices with a decimal point Solution

1. $1 and 28¢

2. $2 and 40¢

3. $3 and 18¢

4. $4 and 30¢

5. $5 and 40¢

6. $6 and 10¢

7. $7 and 24¢

8. $8 and 10¢

💡 Help with this task

· To the exact minute Solution

💡 Help with this task

· Calculating with the calendar Solution

1. 15

2. 22

3. 7

4. 11

💡 Help with this task

· Euli calculates up to 100 Solution

24+30=54

67−25=41→42

36+27=63

80−35=44→45

49+18=67

92−47=46→45

55+38=93

73−28=46→45

💡 Help with this task

· Hands and clock time Solution

💡 Help with this task

· Magic triangles with multiples of six Solution

💡 Help with this task

· Rule houses with minus Solution

💡 Help with this task

· Tricky problems Solution

1. 1. 61
2. 2. 57
3. 3. 44
4. 4. 52
5. 5. 24

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· Magic square - sum 15 Solution

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· Combining more patterns Solution

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· Number magic in the grid Solution

50

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· Secret wizard writing up to 100 Solution

🌟 = 25🌙 = 40⚡ = 18🦉 = 33

🌟+🌙=65

🦉+⚡=51

🌙+🦉=73

🌟+🌟=50

🌙−⚡=22

🦉−🌟=8

🌟+⚡=43

🦉+🌟=58

🦉−⚡=15

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· Spider wheel - addition Solution

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A triple portion up to 100 Solution

🐲Dragon Potion36🔥75🪨93💎

🦉Owl Potion63🪶45🌙90⭐

🌟Star Potion33⭐96🌙60☄️

⛰️Mountain Potion66🪨39💎30❄️

🌊Wave Potion99🐚42🐠72💧

🌳Forest Potion48🍃69🌰93🍄

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· Another number puzzle Solution

• I have 8 tens.
• My ones digit is 3.
• I am bigger than 80.
• I am odd.

Solution: 83

• My tens digit is twice as big as my ones digit.
• I am smaller than 50.
• I am bigger than 40.
• I am even.

Solution: 42

• I am the sum of 35 and 27.
• I am even.
• I have 6 tens.
• My ones digit is 2.

Solution: 62

• I am the difference between 90 and 15.
• I am odd.
• I am bigger than 70.
• My ones digit is 5.

Solution: 75

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· Stamps in the class Solution

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· Math squares up to 100 Solution

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· Find the way through the dungeon! Solution

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· Bag: certain, possible or impossible? Solution

I draw a marble without dots.certain

I draw a striped marble.impossible

I draw two filled marbles one after the other.possible

I draw an empty marble first, then a filled one.possible

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· Even trickier! Solution

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A tricky ingredient hunt for the cauldron Solution

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· Chain problems Solution

25+35−18=42

60−27+13=46

45+28−33=40

72−38+21=55

34+46−25=55

88−39+11=60

27+36−24=39

81−45+18=54

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· Boss level: numbers up to 100 Solution

• 30,36,66
• 40,42,82
• 27,22,49,60,82
• 28,26,54,61,85