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1.8乘3.4减0.8乘3.4简便

4.4*0.8-3.4*0.8=(4.4-3.4)*0.8=1*0.8=0.8

5.4+1.8-3.4-0.8=(5.4-3.4)+(1.8-0.8)=2+1=3或 5.4+1.8-3.4-0.8=(1.8-0.8)+(5.4-3.4)=1+2=3

1.25乘3.4乘0.8=(1.25*0.8)*3.4=1*3.4=3.4

3.24乘1.8减0.8的简便方法3.24乘1.8减0.8=5.832-0.8=5.032直接计算

4/5乘8/3减0.8乘5/34/5X8/3-4/5X3/5=4/5X(8/3-5/3)=4/5X1=4/5

3.4x7.8÷3.9=3.4x(7.8÷3.9)=3.4x2=6.8请采纳谢谢

3.2*0.8+1.8*0.8=0.8*(3.2+1.8)=0.8*5=4

原式=1/4*0.8-0.8+1/2*4/3=(1/4-1)*8/10+2/3=-3/5+2/3=(-9+10)/15=1/15

2.05*3.4*1.8=0.41*5*3.4*1.8=0.41*3.4*9=3.69*3.4=3.69*3+3.69*0.4=11.07+1.476=12.546

解:原式=3.4乘6.8+2.2乘3.4乘3.4=3.4乘2乘3.48+2.2乘3.4乘3.4=3.4乘3.4(2+2.2)=11.56乘4.2=48.552

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