计算下面各题(能简算的要简算)25×18×425×(40+7)18×56+44×18201×4138×99+38101×74-74425+21×(12+28)15×[120-(42+36)](450÷

题目简介

计算下面各题(能简算的要简算)25×18×425×(40+7)18×56+44×18201×4138×99+38101×74-74425+21×(12+28)15×[120-(42+36)](450÷

题目详情

计算下面各题(能简算的要简算)
25×18×4

25×(40+7)

18×56+44×18
201×4138×99+38 101×74-74
425+21×(12+28)15×[120-(42+36)](450÷18-13)×80
600÷[2×(210-180)].
题型:解答题难度:中档来源:不详

答案

(1)25×18×4,
=25×4×18,
=100×18,
=1800;

(2)25×(40+7),
=25×40+25×7,
=1000+175,
=1175;

(3)18×56+44×18,
=18×(56+44),
=18×100,
=1800;

(4)201×41,
=(200+1)×41,
=200×41+1×41,
=8200+41,
=8241;

(5)38×99+38,
=38×(99+1),
=38×100,
=3800;

(6)101×74-74,
=(101-1)×74,
=100×74,
=7400;

(7)425+21×(12+28),
=425+21×40,
=425+840,
=1265;

(8)15×[120-(42+36)],
=15×[120-78],
=15×42,
=630;

(9)(450÷18-13)×80,
=(25-13)×80,
=12×80,
=960;

(10)600÷[2×(210-180)],
=600÷[2×30],
=600÷60,
=10.

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