How to Add Two Numbers with Opposite Signs: A Step-by-Step Guide with Examples

56 + (-18)

38

To add 56 and -18, we can start by placing both numbers on the number line.

First, we start at 0, and then we move 56 steps to the right since the positive number 56 means we go further right on the number line. This brings us to the number 56 on the number line.

Next, we need to add -18. Since -18 is negative, we move 18 steps to the left on the number line. This brings us to the number 38.

Therefore, the sum of 56 and -18 is 38.

Alternatively, we can add 56 and -18 by using vertical addition. We start by lining up the digits, with the 6 from 56 directly above the 8 from -18. Then we add as usual, and carry the 1 over to the tens place.

“`
56
– 18
—
38
“`

So once again, the answer to 56 + (-18) is 38.

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