Question

verify and also name the property used. 18*[100+(-5)]=18*100+18*(-5).

Answer 1

18*[100+(-5)]=18*100+18*(-5)
18*95=1800+(-90)
1710=1710
LHS=RHS
by [Distributive Property of Multiplication over Addition]

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Answer 2

18 × [100 + (-5)] = 18 × 100 + 18 ×5

18 × 95 = 1800 + (-90)

1710 = 1710

LHS = RHS

(Distributive property of multiplication over addition)