Answer:
15
Step-by-step explanation:
Simplify the following:
8×9 - 6×7 - 15
8×9 = 72:
72 - 6×7 - 15
-6×7 = -42:
72 + -42 - 15
72 - 42 - 15 = 72 - (42 + 15):
72 - (42 + 15)
| 4 | 2
+ | 1 | 5
| 5 | 7:
72 - 57
| 6 | 12
| 7 | 2
- | 5 | 7
| 1 | 5:
Answer: 15
[(8*9)] - (6*7)] -15
do the parenthesis first because of using PEMDAS
P= parenthesis
E= exponents
M= multiplication
A= addition
S= subtraction
(8*9)=72
(6*7)=42
72-42=30
72-42-15
30-15
=15
Answer: 15