Select the number property that will justify the step in the following expression.
6 + (14 + 70) =

(6 + 14) + 70 = Associative-Addition, Transitive, Commutative-Addition, Identity-Addition

20 + 70 = 90

Question

Select the number property that will justify the step in the following expression.
6 + (14 + 70) =

(6 + 14) + 70 =  Associative-Addition, Transitive, Commutative-Addition, Identity-Addition

20 + 70 = 90

anonymous · Answer

it is the associative law of addition

anonymous · Answer

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anonymous · Answer

the associative law says 
$$a+(b+c)=(a+b)+c$$

anonymous · Answer

it is easy to remember which one is the associative law: the parentheses move, but the letters stay in the same order

do you have another question you need help with?

anonymous · Answer

Yes

anonymous · Answer

shoot, if i can help  i will

anonymous · Answer

Select the number property that will justify the step in the following expression.
2(5  17) =

(2  5) 17 = Associative-Addition, Commutative-Multiplication, Identity-Addition, Associative-Multiplication 

10  17 = 170

anonymous · Answer

i take it this is 
$$2\times (5\times 17)=(2\times 5)\times 17$$

anonymous · Answer

as in the previous one, the numbers stay in the same order, but the parentheses move
this is the associative law, but this time for multiplication rather than addition

anonymous · Answer

Thx

anonymous · Answer

yw