Question
Write the appropriate number in the empty box and get the answer:



Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

| $ $ |
$7 1$ | $ $ |
$ $ |
$9 9$ | $ $ |
$ $ |
$4 6$ |
| $−$ | $4 0$ | $ $ |
$−$ | $8 8$ | $ $ |
$−$ | $1 6$ |

| $5$ | $6$ | $8$ | |||||
| $+$ | $6$ | $+$ | $3$ | $+$ | $1$ | ||
| $+$ | $4$ | $+$ | $0$ | $+$ | $3$ | ||
| $ $ |
$4 3$ | $ $ |
$ $ |
$5 4$ | $ $ |
$ $ |
$3 9$ |
| $−$ | $2 7$ | $ $ |
$+$ | $4 3$ | $ $ |
$−$ | $2 5$ |



| $ $ |
$2 3$ | m | $ $ |
$2 8$ | m | $ $ |
$3 6$ | m |
| $+$ | $1 5$ | m | $+$ | $2 1$ | m | $+$ | $2 2$ | m |
| $ $ |
$3 2$ | $ $ |
$7 2$ | $ $ |
$8 3$ | ||
| $+$ | $2 3$ | $+$ | $2 6$ | $+$ | $1 5$ | ||