a+b=
a×b=
40+(30+70) =
a+0 =
b+0=
(a+b) +c =
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Answered by
0
Answer:
a+b=b+a
a×b=ab
40+(30+70)=140
a+0=a
b+0=b
(a+b)+c=c+(b+a)
Answered by
1
1) A spuar + b spuar +2AB
3) 40+(100) = 40-100= -60
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