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40.32 2.4的简便算式

4.98+8.64/2.4=4.98+36=40.98 望采纳,谢谢

2.4*9.9=2.4*(10-0.1)=2.4*10-2.4*0.1=24-0.24=23.76

4.04*2.4直接拿前面两个4分别乘以2.4,后面一个4*2.4的结果放后面两位,前面一个4乘的结果放前面,然后看看有多少小数点填上就好例如:4*24=96 4*24=96 结果加上小数点就好9.696

0.92*2.4-0.42*2.4=(0.92-0.42)*2.4=0.5*2.4=1.2

36.72/2.4+100=36/2.4+0.72/2.4+100=15+0.3+100=115.3

1.25x2.4=1.25x(4x0.6)=1.25x4x0.6=5x0.6=3

0.25*2.4=0.25*(2+0.4)=0.25*2+0.25*0.4=0.5+0.1=0.6

83/2=46.5

3.75-0.75*4=3-0.75*3=3*(1-0.75)=3*0.25=0.7514.32-4.32+2.4=(14.32-4.32)+2.4=10+2.4=12.4150/1.25=150/(5/4)=150*(4/5)=1209.8*2.8+28*0.01=28*(0.98+0.01)=28*0.99=28*(1-0.01)=28-0.28=27.7240.32÷24+69.2*8.4=1.68+581.28=582.9650.9÷0.125=50.9*8=(50+0.9)*8=400+7.2=407.2

61.2-3.6+2.4的简便方法怎样计算=61.2-(3.6-2.4)=61.2-1.2=60

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