← Change Exercise
Check the answer with the inverse operation
Use the inverse operation to check the calculation. Is it right?
Calculation: 0 + 0 = 0
Check:
0 − 0 =
Is the calculation right?
All difficulties
0%
Accuracy
0
Current streak
0
Total answers
0
Correct
You can check an answer without a calculator. Do the inverse operation: for 7 488 ÷ 24 = 312, multiply 312 × 24. If you get back the starting number 7 488, the answer is right.
What does this generator do?
It shows a calculation someone has done — sometimes correctly, sometimes with a mistake. You work out the check and decide whether the calculation is right.
How to use it
1) Take the answer of the calculation. 2) Do the inverse operation with the second number. 3) Compare: did you get the first number of the calculation? If yes, the calculation is right.