To subtract 7 from 13 we add $ \ldots \ldots . $ to 13.
Given:
Subtract 7 from 13.
To do:
We have to find the number that we need to add to 13 to get the same value as when we subtract 7 from 13.
Solution:
Subtracting 7 from 13, we get,
$13-7=6$
Let the number to be added to 13 to get the same value as when we subtract 7 from 13 be $x$.
This implies,
$x+13=6$
$x=6-13$
$x=-7$
Therefore, we need to add $-7$ to $13$ to subtract $7$ from $13$.
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