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(3/5×3.625+4.375×0.6)×1.25简便运算

原式 =0.6×(3.625+4.375)×1.25 =0.6×8×1.25 =0.6×10 =6

①1÷2.5+2.5×0.4+1=0.4+1+1,=2.4;②89×[34-(716-0.125)]=89×[34-(716-18)],=89×[34-(716-216)],=89×[1216-516],=89×716,=718;③(35×3.625+4.375×0.6)×1.25=(0.6×3.625+4.375×0.6)×1.25=(3.625+4.375)×0.6×1.25,=8×1.25×0.6,=1...

(1)3.625+2 1 13 +4 12 13 +0.375,=(3.625+0.375)+(2 1 13 +4 12 13 ),=4+7,=11;(2) 1 4 ×7 5 7 +0.25×3 2 7 ,=0.25×7 5 7 +0.25×3 2 7 ,=0.25×(7 5 7 +3 2 7 ),=0.25×(10+1),=2.5+0.25,=2.75.

(1)99×87+87,=(99+1)×87,=100×87,=8700;(2)18.7-3.375-6.625,=18.7-(3.375+6.625),=18.7-10,=8.7;(3)5 2 5 ×( 3 4 +0.5)÷2 1 4 ,=5 2 5 × 5 4 ÷2 1 4 ,=6 3 4 ÷2 1 4 ,=3;(4) 4 15 ÷[( 5 7 - 3 14 )÷ 3 4 ],= 4 1...

原式=3/4x3/8+0.75+62.5%x75%=0.75x0.375+0.75+0.625x0.75=0.75x(0.375+0.625)+0.75=0.75x1+0.75=0.75+0.75=1.5或者=3/4x3/8+0.75+62.5%x75%=0.75x0.375+0.75+0.625x0.75=0.75x(0.375+1+0.625)=0.75x2=1.5供参考。

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

=(4.375/6.25+4.375✘79)/4.75 =(0.7+345.625)/4.75 =72.9

0.125*0.25*32 =(0.125*8)*(0.25*4) =1 25.07-4.98 =25.07-(5-0.02) =25.07-5+0.02 =20.07+0.02 =20.09 4.375+2.9+9.625+7.1 =(4.375+9.625)+(2.9+7.1) =14+10 =24 (0.8*0.08)*12.5 =0.8*(0.08*12.5) =0.8*1 =0.8 (12.5+12.5)*2...

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