How would you group the following expression to make it easier to add?
18−949+79−8
(1 point)
Responses
(8 − 18)+(49+79)
(8 − 18)+(49+79)
(18 − 8)−(949+79)
(18 − 8)−(949+79)
(18 − 9 − 8)+(−49+79)
(18 − 9 − 8)+(−49+79)
(18 − 8 − 9)
)+(−49+79)
(18 − 8 − 9)+(−49+79)
What is 12815−7+715+15 in simplest form?(1 point)
Responses
411515
41 and 15 over 15
21
21
201515
20 and 15 over 15
35
12815−7+715+15 equals 13638.
To group the given expression to make it easier to add, we can use the associative property of addition. The expression can be grouped as follows:
(18−9−8)+(−49+79)
To group the expression in a way that makes it easier to add, we can use parentheses to indicate which numbers will be added together.
In this case, we can group the expression as follows:
(18 - 9 - 8) + (49 + 79)
By grouping the subtraction terms (18 - 9 - 8) together in parentheses, and also grouping the addition terms (49 + 79) together in parentheses, we can make it easier to mentally calculate the additions separately.