🔍Find the mistake: math practice, grades 2–5

Practise “Find the mistake” online for free. Five right answers in a row make the tasks harder, two mistakes in a row make them easier. Right answers earn coins for games.

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Example problems

These are only examples: the practice makes new tasks every time.

1. Four problems are solved, but one has a mistake. Find it!

   Answer

   3 + 5 = 7

2. Four problems are solved, but one has a mistake. Find it!

   Answer

   70 − 51 = 21

3. Four problems are solved, but one has a mistake. Find it!

   Answer

   3 × 7 = 23

4. Four problems are solved, but one has a mistake. Find it!

   Answer

   8 × 6 = 46

5. Four problems are solved, but one has a mistake. Find it!

   Answer

   42 × 9 = 368

6. Four problems are solved, but one has a mistake. Find it!

   Answer

   0.3 × 0.4 = 1.2

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