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脱式计算,能简算的要简算.2.65×1.7+1.35×1.723.4...

(1)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(2)23.4÷7.8-2.1,=3-2.1,=0.9;(3)0.75×18÷0.15,=0.75÷0.15×18,=5×18,=90;(4)2.5×3.2×1.25,=2.5×4×0.8×1.25,=(2.5×4)×(0.8×1.25),=10×1,=10.

(1)8.65-3.7+1.35-6.3=(8.65+1.35)-(3.7+6.3),=10-10,=0; (2)[2.1+3.61÷(7.2-5.3)]×30=[2.1+3.61÷1.9]×30,=[2.1+1.9]×30,=4×30,=120;(3)1.2+36÷[1.44×(0.1-0.05)]=1.2+36÷[1.44×0.05],=1.2+36÷0.072,=1.2+500,=501.2;...

(1)2.5×4.78×0.4 =(2.5×0.4)×4.78=1×4.78=4.78(2)0.65×101 =0.65×(100+1)=0.65×100+0.65=65+0.65=65.65(3)1.7×2.65+1.35×1.7=1.7×(2.65+1.35)=1.7×4=6.8(4)7.06×2.4-5.7=16.944-5.7=11.244(5)7.28+3.2÷2.5=7.28+1.28=8.56(6)3...

(1)12.25-3.1+0.85-6.17,=(12.25+0.85)-3.1-6.17,=13.1-3.1-6.17,=3.83;(2)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)3.6÷(1.2+0.5)×5,=3.6÷1.7×5,=3617×5,=101017; (4)0.125×0.38×80,=(0.125×80)×0.38...

2.65x2.7 1.35简便运算怎么做? 2.65x2.7 1.35 =7.155+1.35 =8.505 直接计算

(1)8×1.09×1.25,=8×1.25×1.09,=10×1.09,=10.9;(2)1.5×106,=1.5×(100+6),=1.5×100+1.5×6,=150+9,=159;(3)1.65×4.3+8.35×4.3,=(1.65+8.35)×4.3,=10×4.3,=43;(4)3.8+7.19+5.2+3.91,=(3.8+5.2)+(7.19+3.91),=9+11.1...

(1)2.65+1.7+1.35+8.3,=(2.65+1.35)+(1.7+8.3),=4+10,=14;(2)2.7×2×0.5,=2.7×(2×0.5),=2.7×1,=2.7;(3)18×5+12×5,=(18+12)×5,=30×5,=150.

2.65*1.7+7.35*1.7 =(2.65+7.35)*1.7 =10*1.7 =17

(1)12.25-3.1+0.85-6.17,=(12.25+0.85)-3.1-6.17,=13.1-3.1-6.17,=3.83;(2)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)3.6÷(1.2+0.5)×5,=3.6÷1.7×5,= 36 17 ×5,= 10 10 17 ; (4)0.125×0.38×80,=(0.125×80...

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