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脱式计算(能简算的要简算):(1)3.5×0.8+7.5×0....

7.5-7.5×0.8 =7.5×(1-0.8) =7.5×0.2 =1.5

①18又5分之3-(2.35+8.6) =18又-8.6-2.35 =10-2.35 =7.65 ②68÷【0.5×(7.5-0.7)】 =68÷(0.5×6.8) =68÷6.8÷0.5 =10÷0.5 =20 ③352-162÷36×24 =352-4.5×24 =352-108 =244 ④【6分之5-(14分之5-7分之2)】×18分之7 =(5/6-1/14)×7/18 =16/21×7/18...

(1)5.5×17.3+6.7×5.5=5.5×(17.3+6.7)=5.5×24=132;(2)1.5×105=1.5×(100+5)=1.5×100+1.5×5=150+7.5=157.5;(3)9.07-22.78÷3.4=9.07-6.7=2.37;(4)3.8+4.29+2.1+4.2=(3.8+4.2)+(4.29+2.1)=8+6.39=14.39;(5)2.65×1.7+1.35×1.7=...

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...

45.55-(6.82+15.55) 34.52-17.87-12.23 6.43-(1.4-0.57) 23.75-8.64-3.46 17.83-9.5-7.83-0.5 5.38+88.2-2.38+1.8 27.38-5.34+2.62-4.66 21.63-(8.5+9.63) 7.5-2.45+7.5+2.45 5.09-(0.09+1.23) 9.36-(4.36-3.5)

0.8×3.27×7.5脱式计算 0.8×3.27×7.5 =3.27*(0.8*7.5) =3.27*6 =1962 直接计算

5.3×6.3+2.3= 4.4×7.3+5.3= 4×8.8+1.5= 4.1×0.8-0.2= 9.9×1.4+0.6= 6.4×2.4+3.6= 12.48-4×9.7= 9.8×1.3-0.3= 4.8×9.1-0.5= 4.2×1.8-0.1= 5.59-3×4.3= 3.053-0.1×5.3= 9.4×8.4+5.8= 6.908-1.3×1.6= 13.596-9.1×5.6= 11.259-2.1×7.9= 7.3+3.8×2.3=...

第一题144-144÷【8*9】+858 =144-144÷72+858 =144-2+858 =1000 第二题0.025*【1÷12.5+0.168÷0.5】 =0.025*(0.08+0.336) =0.025*0.416 =0.0104 第三题【8分之5+7.5*(25分之5-30分之7)】÷8分之1 =【8分之5-7.5*1/30】*8 =8分之5*8-7.5*1/30*8 =5...

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×...

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