B 2+3 = 3 +2 =5 (6) Addition is associative cb) reaction is associate (C) Addition is (commutative 2) 4xs= 5x4 = 20
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= ( 5×7 ) ×1/3
2×4 = 35/8 × 1/3
= 35×1
3×3
= 3.5 -2
24
from 1,2
LHS:RHS
a×(b×c)=(a×b)
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