脱式计算下面各题(1)8.48÷0.8×0.9(2)615+38.5×7.2+38.5×2.8(3)(12-3.74)÷(8×0.3+2×1.3)(4)[7.35+2.25×(0.55-0.15)]÷

题目简介

脱式计算下面各题(1)8.48÷0.8×0.9(2)615+38.5×7.2+38.5×2.8(3)(12-3.74)÷(8×0.3+2×1.3)(4)[7.35+2.25×(0.55-0.15)]÷

题目详情

脱式计算下面各题
(1)8.48÷0.8×0.9
(2)615+38.5×7.2+38.5×2.8
(3)(12-3.74)÷(8×0.3+2×1.3)
(4)[7.35+2.25×(0.55-0.15)]÷0.825.
题型:解答题难度:中档来源:不详

答案

①8.48÷0.8×0.9,
=10.6×0.9,
=9.54;

②615+38.5×7.2+38.5×2.8,
=615+(7.2+2.8)×38.5,
=615+385,
=1000;

③(12-3.74)÷(8×0.3+2×1.3),
=8.26÷(2.4+2.6),
=8.26÷5,
=1.652;

④[7.35+2.25×(0.55-0.15)]÷0.825,
=[7.35+2.25×0.4]÷0.825,
=[7.35+0.9]÷0.825,
=8.25÷0.825,
=10.

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