Question
Count the lines and write the number in the given box.



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


| $ $ |
$2 4$ | $ $ |
$ $ |
$9 0$ | $ $ |
$ $ |
$5 0$ |
| $+$ | $4 8$ | $ $ |
$−$ | $1 1$ | $ $ |
$−$ | $1 2$ |


| $ $ |
$4 1$ | $ $ |
$3 5$ | $ $ |
$3 6$ | ||
| $+$ | $1 6$ | $+$ | $2 4$ | $+$ | $2 2$ | ||