Question

(5TH GRADE MATH HELP)

To add (30 + 5) + 45, Mark first added 5 and 45. Which property did Mark use to add mentally?

A) Identity Property of Addition
B) Associative Property of Addition
C) Zero Property of Addition
D) None

Answer 1

@ganeshie8 @nincompoop

Answer 2

@e.mccormick @Zale101 @mathmate

Answer 3

@texaschic101

Answer 4

Associative property

Answer 5

Okay @texaschic101 do you agree?

Answer 6

@StudyGurl14 @Jhannybean

Answer 7

@sleepyjess

Answer 8

I agree....associative property

Answer 9

Ok thank you

Answer 10

sure thing :)

Answer 11

@rishi_k texaschic101
Guys, please explain to the asker why it is the answer you proposed. We're not here to give direct answers and the asker is not learning anything.
Please, if you know why your answer is correct, explain it. If you don't, leave the question alone.
@Tom_Boy_Rebel
Associative property of addition is the property that we can regroup the additions differently and still get the same answer.
For example, 1+2+3=(1+2)+3=1+(2+3)=6.
We can add 1+2=3 and then 3+3=6, or
(2+3)=5 and then add 1 to get 6.
See
http://www.coolmath.com/prealgebra/06-properties/03-properties-associative-addition-01
for more examples.

Answer 12

Then @mathmate
Associative property states that
for any real numbers A,B&C
(A+B)+C=A+(B+C)
And
(A*B)*C=A*(B*C)

Answer 13

@rishi_K
Beautiful!
You have also explained associative property on addition and on multiplication...
and... thank you!