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3.75%【7.2÷4.5÷2】怎么简算

2.95

(8.25-3.75)÷2.5÷4 =4.5÷(2.5×4) =4.5÷10 =0.45

五年级上册简便算法题10÷3.14-6.86÷3.1437.68÷0.25÷43.75-(2.75-1.3)37.56-(18+7.56)0.77÷144.5×9.80.7÷0.1250.7÷0.252.5×3.2×12.512.5×9.6×0.253.75-(2.8-1.25)37.65÷0.4÷0.253.125÷8÷0.12537.65-4.75-3.2525×6.4×12.53.6×0.25答案10÷3...

(1)10.53÷(0.99-0.45+1.8),=10.53÷(0.54+1.8),=10.53÷2.34,=4.5;(2)18÷[125×(25+110)],=18÷[125×12],=18÷150,=6.25;(3)3.75+4.5÷0.18×0.25,=3.75+25×0.25,=3.75+6.25,=10; (4)3000-144÷12×83,=3000-12×83,=3000-996...

解:由题意得, 土豆: 4.5÷1.2=3.75元/千克 洋葱:2.8÷0.8=3.5元/千克 3.75>3.5,所以洋葱便宜些

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