multiplicative property of zero
reciprocal 2/3 x 3/2= 1
any number plus zero equals that number
(ab)c = a(bc)
doesnt matter what order u put the number in as long as u add or multiply, you will get the same sum or product
an equation can be replaced by a diffrent, but equal equation to make a problem easier
a(b+c) = ab+ac
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