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
please help me:(

Answer 1

Hint:

27 + 15 + 3 + 5

may be easier to do in your head if you swap 15 and 3 to get

27 + 3 + 15 + 5

Answer 2

commutative propery
commutative property of addition a+b=b+a
commutative property of multiplication ab=ba

Answer 3

using words
commutative property allows you to add numbers in any order
a+b=b+a or 12+3=3+12
for the second case it allows you to multiply numbers in any order
ab=ba
2*5=5*2

Answer 4

jim_thompson5910 is correct

Answer 5

so it b???

Answer 6

re-read what precal wrote

Answer 7

ow its c

Answer 8

you sure?

Answer 9

no not really:(

Answer 10

which property did precal mention?

Answer 11

comunitive

Answer 12

that's your answer