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脱式计算8.4×0.26

1÷1+0.26+26÷1 =1+0.26+26 =1.26+26 =27.26 满意采纳奥

0.26*70.75/65/2.83 =18.395÷65÷2.83 =0.283÷2.83 =0.1

26.8×100.1 =26.8×(100+0.1) =26.8×100+26.8×0.1 =2680+2.68 =2682.68

(1)0.26×2.5+0.74×2.5-2.5=(0.26+0.74-1)×2.5=0×2.5=0;(2)0.25×12.5×1.6=0.25×12.5×8×0.2=(0.25×0.2)×(12.5×8)=0.05×100=5;(3)17.64÷4.9+6.73=3.6+6.73=10.33;(4)10.1×87=(10+0.1)×87=10×87+0.1×87=870+8.7=878.7.

(1)2.31×12-26=27.72-26=1.72;(2)134-34.5×2.4=134-82.8=51.2;(3)3.75×0.24+3.8=0.9+3.8=4.7;(4)3.4×(1.09-0.19)=3.4×0.9=3.06;(5)1.32×2.1+5.1×2.9=2.772+14.79=17.562;(6)10-2.33-4.67=10-(2.33+4.67)=10-7=3.

38*26的脱式计算怎么做 =(40-2)*26 =40*26-2*26 =1040-52 =988

30-28+26-24+22-20+…+6-4+2-0因为每一档计算结果是2你只要知道有几档就行,一共八档所以: =2x8 =16

3.75-6.8*0.26 =3.75-1.768 =1.982 (9-2.35)*0.64 =6.65*0.64 =4.256 78.7-17.7*3.6 =78.7-63.72 =14.98 9.9*(101-9.9) =9.9*91.1 =901.89

2012年1月28日星期六一、口算题小数加法:0.3+1.5=2.5+9.8=7.6+1.3=4.4+5.7=2.3+7.7=5.7+3.1=7.69+2.31=9.16+2.64=5.68+12.22=16.8+16.5=小数减法:6.8-3.8=4.26-3.71=0.88-2.12=5.34-69.21=68.4-61.5=9.58-3.7=18.94-5.66=15.69-9.78=115-68.59...

(1)(124-85)×12÷26,=39×12÷26,=468÷26,=18;(2)(75+360)÷(20-5),=435÷15,=29;(3)19.92+14.4-9.92,=19.92-9.92+14.4,=10+14.4,=24.4;(4)85.7-(15.3-4.8),=85.7-10.5,=75.2;(5)9.5+4.85-6.13,=14.35-6.13,=8.22...

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