• Question 1.
-9 + -7
To evaluate the expression above, we have:
-9 + -7
A plus sign followed by a minus sign is the same mathematically as a single minus sign.
Replace + - with a single -
= -9 - 7
Subtract 7 from -9:
-9 - 7 = -16
• Question 2.
-11 - 3
To perform the subtraction above, subtract 3 from -11.
- 11 - 3 = -14
ANSWER:
1) -16
2) -14