Question

Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?

A.commutative property of addition
B. distributive property
C. additive identity
D. additive inverse

Answer 1

A, the commutative property of addition. The correct answer is the commutative property of addition, allowing us to rearrange numbers and make mental computation easier, leading to a simplified sum of 50.

Step-by-step explanation:

The correct answer is option This property states that the order in which numbers are added does not affect the sum. Using this property, we can rearrange the numbers in the problem 27 + 15 + 3 + 5 to group the 27 with the 3 and the 15 with the 5, making it easier to perform mental computation:

• 27 + 3 = 30
• 15 + 5 = 20

Now, simply add the two results together:

• 30 + 20 = 50

Thus, the original problem simplifies to a final answer of 50, using mental computation facilitated by the commutative property.

The correct answer is option A, the commutative property of addition. This property states that the order of the numbers being added does not affect the result. In other words, you can add the numbers in any order and still get the same sum. For example, 27 + 15 + 3 + 5 is the same as 15 + 3 + 27 + 5, and both equations will result in the sum of 50.