Foxsum
Missing number: math practice, grades 1–3
Practise “Missing number” 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.
Example problems
These are only examples: the practice makes new tasks every time.
? + 2 = 8
Answer
6
15 + ? = 18
Answer
3
49 − ? = 45
Answer
4
? + 18 = 37
Answer
19
19 + ? = 50
Answer
31
? × 7 = 21
Answer
3