Question

How should you group the following expression to make it easiest to add? 18 - 9 + 49 - 79 - 8

a) 18 - (9 + 49) - 79 - 8
b) (18 - 9) + (49 - 79) - 8
c) 18 - 9 - (49 + 79) - 8
d) 18 - 9 - 49 - 79 - 8

Answer 1

To make it easiest to add the expression 18 - 9 + 49 - 79 - 8, we should group it as (18 - 9) + (49 - 79) - 8. The answer is -29.

Step-by-step explanation:

To make it easiest to add the expression 18 - 9 + 49 - 79 - 8, we should group it as (18 - 9) + (49 - 79) - 8. By grouping the numbers this way, we can simplify each set of parentheses separately and then add the results together.

Step-by-step:

1. (18 - 9) = 9
2. (49 - 79) = -30
3. (9) + (-30) - 8 = -29

So, the answer is -29.