Question

The model shows the expression 21 + 9.

Which expression is equivalent to this sum?
O 3(7+3)
O 3(7) + 3
O 3+7+3
07(3+3)

Answer 1

A.

Explanation:

PEMDAS

U add the parentheses first 7+3=10

3 times 10 =30

21+9=30

Answer 2

A

Explanation:

21 + 9 = 30

Solve parentheses then multiplication

3(7+3)

7 + 3 = 10

10 * 3 = 30