Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?
1) commutative property of addition
2) distributive property
3) additive identity
4) additive inverse
That is the distributive property, just E
The property that would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5 is the commutative property of addition.
The commutative property of addition states that the order in which numbers are added does not affect the sum. In other words, when adding multiple numbers, you can rearrange the order in which you add them and still get the same result.
To simplify the problem using the commutative property of addition, you can group the numbers in any order you prefer. For example, you could rearrange the expression as 27 + 5 + 15 + 3.
Now, you can perform the mental computation by starting with the larger numbers first. Add 27 and 5 to get 32. Then, add 15 to 32 to get 47. Finally, add 3 to 47 to get the final result of 50.
Therefore, by using the commutative property of addition, you can simplify the problem 27 + 15 + 3 + 5 mentally and find the answer of 50.
mentally I would do it as
27+3 + 15+5
or
30+20
You decide which properties I used.