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17.5÷1.25÷0.08脱式计算

17.5÷1.25÷0.08脱式计算 =17.5÷(1.25x0.08) =17.5÷0.1 =175

5.44÷(1.25×0.8)=5.44÷1 0.4÷0.4×5×5=25 第二个没有简便方法

(1)17.4÷0.8÷1.25,=17.4÷(0.8×1.25),=17.4÷1,=17.4;(2)1.8÷0.2÷0.3,=1.8÷(0.2×0.3),=1.8÷0.06,=30;(3)24÷O.6+0.6÷24,=40+0.025,=40.025;(4)17.94÷3.9+5.3×0.4,=4.6+2.12,=6.72.

0.91÷0.8+1.25×1.08 =0.91×1.25+1.25×1.08 =(0.91+1.08)×1.25 =1.99×1.25 =2.4875

(1)51.6÷[(3 2 5 -1.25)× 4 5 ],=51.6÷[(3.4-1.25)× 4 5 ],=51.6÷[2.15× 4 5 ],=51.6÷1.72,=30;(2)( 5 6 - 3 4 )÷( 1 4 + 1 6 ),= 1 12 ÷ 5 12 ,= 1 12 × 12 5 ,= 1 5 .

240

①1.258×18.5-0.258×18.5,=18.5×(1.258-0.258),=18.5×1,=18.5;②8.48÷0.8×0.9,=10.6×0.9,=9.54;③1.25×2.4,=1.25×8×0.3,=10×0.3,=3;④5.85÷(1.3+0.5)×6,=5.85÷1.8×6,=3.25×6,=19.5.

(1)2.4×5.2×1.25,=0.3×8×5.2×1.25,=(0.3×5.2)×(1.25×8),=1.56×10,=15.6;(2)(4.8×9.9+4.8×0.1)÷1.6,=4.8×(9.9+0.1)÷1.6,=4.8×10÷1.6,=48÷1.6,=30;(3)(3.2+18-4.04×5)÷0.2,=(3.2+18-20.2)÷0.2,=(21.2-20.2)÷0.2...

(1)3.72-(1.72+1.3),=3.72-1.72-1.3,=2-1.3,=0.7;(2)18×45+4×25,=18×45+2×45,=(18+2)×45,=20×45,=16;(3)1.25×32×0.25,=1.25×(4×8)×0.25,=(1.25×8)×(4×0.25),=10×1,=10;(4)(45+14)÷72?110,=2120÷72?110,=310...

30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 (31.8+3.2×4)÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 ...

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