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脱式计算8.4×0.26

(1)8.4×0.26+58=2.184+0.625,=2.809.(2)34+76-17=2312?17,=14984;(3)31.7-0.5×0.7-1.65=31.7-0.35-1.65,=31.7-(0.35+1.65),=31.7-2,=29.7.(4)0.8×(3.2-15)=0.8×(3.2-0.2),=0.8×3,=2.4;(5)42.3×18+7.7×18=(42.3+7.7...

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

7.8÷0.26÷0.3 =7.8÷(0.26×0.3) =7.8÷0.78 =10,

380÷(26-24)×0.5 =380÷2×0.5 =190×0.5 =95

7.2x0.26+72x0.374 =72x0.026+72x0.374 =72x(0.026+0.374) =72x0.4 =28.8

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

228÷38×26 =(19×12)÷(2×19)×26 =(19÷19)×(12÷2)×26 =1×6×26 =156。

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)0.36×1.5×0.4,=0.36×(1.5×0.4),=0.36×0.6,=0.216;(2)0.05×3.2×40,=(0.05×40)×3.2,=2×3.2=6.4;(3)26×15.7+15.7×74,=(26+74)×15.7,=100×15.7,=1570;(4)3.78×0.5-0.65,=1.89-0.65,=1.24;(5)3.98+13.4×0.24,=3.9...

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

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