Seudónimo Seudónimo

16-09-2016
Mathematics

contestada

What property is shown by the equation?

Column A

Column B

--- ABC

1.

(34 + 11) + 9 = (11 + 34) + 9

--- ABC

2.

25 + (–15 + 4) = (25 + (–15)) + 4

--- ABC

3.

–(–21 + 8) = 21 + (–8)

--- ABC

4.

–30 + (–16) = –16 + (–30)

A.

commutative property

B.

associative property

C.

opposite of a sum property

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Аноним Аноним

10-10-2018

wait what is it i needddd helllpppp

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