www.gsyw.net > 28.5×0.85+2.85×1.5递等式怎么做?

28.5×0.85+2.85×1.5递等式怎么做?

2.82*1.5 + 28.2*0.85= 28.2x0.15+ 28.2x0.85= 28.2x(0.15+0.85)= 28.2x1= 28.2

28.5÷15递等式应该怎么做=28.5÷15=(30-1.5)÷15=30÷15-1.5÷15=2-0.1=1.9

2.85*5.35+2.85*4.65递等式计算解:根据提取公因式的简便方法,原式=2.85x(5.35+4.65)=2.85x10=28.5

1.8*0.85+0.15*4.8=1.53+0.72=2.25

2.85x1.5+1.5=1.5x(2.85+1)=1.5x3.85=1.5x4-1.5x0.15=6-0.225=5.775

2.85x0.4x1.5怎么简便运算2.85x0.4x1.5=2.85*(0.4*1.5)=2.85*0.6=1.71

45*(2.85+1.65)=5*9(4+0.5)=5*9*4+5*9*0.5=180+2.5*(10-1)=180+25-2.5=202.5

=2.85(5.35+4.65)=2.85*10=28.5

9.6*28.5+2.85*4=9.6*28.5+28.5*0.4=28.5*(9.6+0.4)=28.5*10=285

(1)5.6*0.85*7.8=4.76*7.8=37.128;(2)4.32*99+4.32=4.32*(99+1)=4.32*100=432;(3)99*3.74=(100-1)*3.74=100*3.74-3.74=374-3.74=370.6;(4)1.25*3.2*0.25=1.25*8*0.4*0.25=(1.25*8)*(0.4*0.25)=10*0.1=1;(5)1.2*2.6+3*4.25 =33.12+12.75=45.87;(6)1.25*7.2=1.25*8*0.9=(1.25*8)*0.9=10*0.9=9.

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