Question
Without actual counting, find the total number of objects.



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| $ $ |
$3 8$ | m | $ $ |
$5 4$ | cm | $ $ |
$6 0$ | m |
| $+$ | $5 0$ | m | $+$ | $3 7$ | cm | $+$ | $3 0$ | m |
| $ $ |
$5 7$ | $ $ |
$ $ |
$8 5$ | $ $ |
$ $ |
$6 4$ |
| $−$ | $1 3$ | $ $ |
$−$ | $6 1$ | $ $ |
$−$ | $3 0$ |

| $ $ |
$6 8$ | $ $ |
$ $ |
$9 7$ | $ $ |
$ $ |
$8 9$ |
| $−$ | $5 3$ | $ $ |
$−$ | $4 1$ | $ $ |
$−$ | $4 5$ |




