Question

Use Structure Sheri adds 135 + 1,048 using mental math. What properties and strategies can Sheri use to find the sum?

a. Associative Property and Break Apart
b. Commutative Property and Regroup
c. Identity Property and Combine
d. Distributive Property and Expand

Answer 1

Sheri can apply the Commutative Property and Regroup strategy for mental math addition of 135 + 1,048, which simplifies to adding 1,183.

Step-by-step explanation:

When Sheri adds 135 + 1,048 using mental math, she can use various properties and strategies to find the sum. The correct answer is b. Commutative Property and Regroup. The Commutative Property allows Sheri to switch the order of the numbers being added without changing the result. For instance, 135 + 1,048 is the same as 1,048 + 135. Using the strategy of regrouping, Sheri can break apart numbers into hundreds, tens, and ones to simplify the addition: 1,000 + 100 + 48 + 30 + 5. When she combines these values, she'd get 1,000 + (100 + 30) + (48 + 5), which is easier to add mentally to get 1,183.