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脱式计算.(能简算的要简算)(1)0.08×720×1.25(2)5.25×8.2+5.25×0.8+5.25(3)0.125×808(4)18.45-(3.8×2.7+5.3)(5)0.5+7.2÷1.44×0.4(6)1.32×(0.9÷18)
题目详情
脱式计算.(能简算的要简算)
(1)0.08×720×1.25
(2)5.25×8.2+5.25×0.8+5.25
(3)0.125×808
(4)18.45-(3.8×2.7+5.3)
(5)0.5+7.2÷1.44×0.4
(6)1.32×(0.9÷18)
(1)0.08×720×1.25
(2)5.25×8.2+5.25×0.8+5.25
(3)0.125×808
(4)18.45-(3.8×2.7+5.3)
(5)0.5+7.2÷1.44×0.4
(6)1.32×(0.9÷18)
▼优质解答
答案和解析
(1)0.08×720×1.25
=0.08×1.25×720
=0.1×720
=72;
(2)5.25×8.2+5.25×0.8+5.25
=5.25×(8.2+0.8+1)
=5.25×10
=52.5;
(3)0.125×808
=0.125×(8×101)
=(0.125×8)×101
=1×101
=101;
(4)18.45-(3.8×2.7+5.3)
=18.45-(10.26+5.3)
=18.45-15.56
=2.89;
(5)0.5+7.2÷1.44×0.4
=0.5+5×0.4
=0.5+2
=2.5;
(6)1.32×(0.9÷18)
=1.32×0.05
=0.066.
=0.08×1.25×720
=0.1×720
=72;
(2)5.25×8.2+5.25×0.8+5.25
=5.25×(8.2+0.8+1)
=5.25×10
=52.5;
(3)0.125×808
=0.125×(8×101)
=(0.125×8)×101
=1×101
=101;
(4)18.45-(3.8×2.7+5.3)
=18.45-(10.26+5.3)
=18.45-15.56
=2.89;
(5)0.5+7.2÷1.44×0.4
=0.5+5×0.4
=0.5+2
=2.5;
(6)1.32×(0.9÷18)
=1.32×0.05
=0.066.
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