Question

Anna is evaluating some rational expressions. Which THREE are correct?

Responses
A 134 − (−16) = 118134 − (−16) = 118
B 152 − 200 = −48152 − 200 = −48
C −39 − (−28) = −11
D 89 − (−17) = 10689 − (−17) = 106
E −25 + (−25) = 0

Answer 1

B , C, D

Explanation:

In integer subtraction, Keep the first number. Change subtraction to addition and write the additive inverse of the second number.

When two integers have different sign, subtract and the result will have the sign of the bigger number.

B) 152 - 200 = 152 + (-152)

= -48

Here, bigger number is 200 and it is the negative number. So, 200 - 152 is 48 and the sign of 48 is negative.

C) -39 - (-28) = -39 + 28

= -11

D) 89 - (-17) = 89 + 17

= 106