Euli has been calculating, but not every result is right!
Work out every problem yourself and find the mistakes.
Example: 24 + 30 = 53
Check it: 24 + 30 makes 54, not 53.
Euli made a mistake here, the result is wrong.
Tip: work step by step in peace, then the mistakes stand out.
The numbers filled in show the solution.
Example
24+30=53→54
67−25=41→42
For parents
What does this exercise practice?
Check results by working them out yourself and spot the mistakes.
Common pitfalls
Children often trust the result that is written down. What matters is really working out every problem, not just skimming it.
How to practice at home
Write math problems for each other, some of them wrong on purpose, and look for the mistakes together.
Related: Calculation, Inverse