Question

Medal!!! Indicate which property is illustrated in Step 1.

Step 1 9 + (1 + 12) + 0 = 9 + (12 + 1) + 0
Step 2 = (9 + 12) + (1 + 0)
Step 3 = (9 + 12) + 1
Step 4 = 21 + 1
A. distributive property
B. commutative property of multiplication
C. commutative property of addition
D. associative property of addition

Answer 1

can you please explain as well?

Answer 2

step on1 its d i for sure

Answer 3

wait is its b 2.a 3.b4 d

Answer 4

@cookiemonster2412

Answer 5

im thinking its b or c

Answer 6

@DancerAtHeart111 its not B you dont use multiplication on this problem its addition.

Answer 7

i meant c or d