Question

Which of the expressions below has a sum of 0? select all that apply A. 4+(-4) B. 6.3 +(-3.6) C. 13+(-11) D. -9+9

Answer 1

A. 4+(-4),

D. -9+9​

Explanation:

A expression has a sum of 0 when we have two equal numbers with inverse signals.

A. 4+(-4)

We have the same number(4), and they have inverse signals. So this expression has a sum of 0.

B. 6.3 +(-3.6)

6.3 and 3.6 are different numbers, so this expression does not have a sum of 0.

C. 13+(-11)

13 and 11 are different numbers, so this expression does not have a sum of 0.

D. -9+9​

We have the same number(9), with inverse signals. So yes, this expression has a sum of 0.