Euli has done the math, but every answer is wrong!
Check it yourself and write the correct answer next to it.
Example: Euli writes 150 + 230 = 390.
The correct answer is: 150 + 230 = 380.
The numbers filled in show the solution.
Example
150+230=390→380
420−180=240
340+250=590
730−260=480→470
For parents
What does this exercise practice?
Critically check results instead of simply believing them. This trains checking skills.
Common pitfalls
Children sometimes take the wrong answer as their starting point. Calculate it yourself first, then compare!
How to practice at home
Write down a calculation with a small mistake and let your child find the error.
Related: Number Sentences with a Gap, Estimating and Rounding to Check