(-49)*18;(-25)*(-31);70*(-19)+(-1)*70 using distributive property
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-(49) × 18 = (-50 + 1) × 18
= -50 × 18 + 1 × 18
= -900 + 18
= -882
(-25) × (-31) = (-25) × (-30 - 1)
= 750 + 25
= 775
= -50 × 18 + 1 × 18
= -900 + 18
= -882
(-25) × (-31) = (-25) × (-30 - 1)
= 750 + 25
= 775
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