Question
Subtract the following :



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| $ $ |
$4 0$ | m | $ $ |
$6 8$ | cm | $ $ |
$5 2$ | m |
| $−$ | $1 6$ | m | $−$ | $4 3$ | cm | $−$ | $2 9$ | m |

| $ $ |
$7 0$ | m | $ $ |
$3 4$ | cm | $ $ |
$4 7$ | cm |
| $+$ | $2 4$ | m | $+$ | $1 4$ | cm | $+$ | $3 2$ | cm |