In a digit swap the two digits change places.
The tens become ones and the ones become tens.
Example: The number 72 has 7 tens and 2 ones.
You turn it around: 72 becomes 27.
The number you write in shows the answer.
Example
72→27
48→84
31→13
86→68
For parents
What does this exercise practice?
Recognize the tens and ones of a number and swap their places.
Common pitfalls
Many children just write the same number again. Make sure the first and the second digit really change places.
How to practice at home
Take turns naming numbers and swap them around. Whoever says the swapped number first gets a point.
Related: Split a number into tens and ones, Ordering Numbers