Question

Rocío had cups of raisins. She used cup in her morning oatmeal and cup in her lunch salad. Later she bought a cups more of raisins.

The table shows the first two steps and the properties she used to find out how many cups of raisins she has now. 7NS.1. ZNS.10n
Step 1
Commutative Property (+)
Step 2
(3) - Associative Property (9)
Part A: How did Rocio use the Associative Property in the second step?
Part B: How many cups of raisins does Rocio have now?

Answer 1

Rocío used the Associative Property to regroup addends when finding the total cups of raisins she had after some usage and an additional purchase. To calculate the final amount accurately, specific numerical values are required which are not provided in the question.

Step-by-step explanation:

Part A: Rocío used the Associative Property in the second step to regroup the amounts of raisins when adding. The Associative Property of addition states that the way in which addends are grouped does not change the sum. In this case, it allows her to add the amounts she used and then add the amount she bought.

Part B: To find out how many cups of raisins Rocío has now, we would calculate the sum of the initial cups, subtract the cups she used, and then add the cups she purchased. Unfortunately, the initial amount of cups Rocío had is not specified in the question given, nor is the number of cups bought.

With the correct numbers, you would perform the calculation following the commutative property first (changing the order of the addends does not change the sum) and then the associative property (changing the grouping of the addends does not change the sum).