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



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| $ $ |
$2 2$ | cm | $ $ |
$5 3$ | cm | $ $ |
$6 0$ | m |
| $−$ | $2 2$ | cm | $−$ | $4 1$ | cm | $−$ | $2 9$ | m |

| $ $ |
$4 3$ | m | $ $ |
$5 0$ | m | $ $ |
$5 2$ | m |
| $+$ | $3 4$ | m | $+$ | $4 5$ | m | $+$ | $4 2$ | m |


| $ $ |
$9 3$ | $ $ |
$ $ |
$8 4$ | $ $ |
$ $ |
$7 8$ |
| $−$ | $6 2$ | $ $ |
$−$ | $7 2$ | $ $ |
$−$ | $2 5$ |


| $ $ |
$1 2$ | $ $ |
$ $ |
$5 0$ | $ $ |
$ $ |
$3 8$ |
| $+$ | $1 5$ | $ $ |
$+$ | $2 3$ | $ $ |
$−$ | $1 2$ |