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5.4×2.4÷7.2是用竖式计算

从左向右算

5.4x2.4÷7.2=1.8x3x2.4÷7.2=1.8x7.2÷7.2=1.8x1=1.8

5.4*2.4*1.25=5.4*3*0.8*1.25=(5.4*3)*(0.8*1.25)=16.2*1=16.2 1.99*0.63=(2-0.01)*0.63=1.26 - 0.0063=1.2537

解:(7.2*7.5*5.4)÷(2.4*1.5*2.7)=(0.9*8*1.5*5*3*2*0.9)÷(0.3*8*1.5*3*0.9)=10 解:(7.2*7.5*5.4)÷(2.4*1.5*2.7) =(0.9*8*1.5*5*3*2*0.9)÷(0.3*8*1.5*3*0.9) = (8*1.5*3*0.9 *0.3*3 *5 *2 )÷(8*1.5*3*0.9 * 0.3 ) =3 *5 *2 =30.

=5.4*2.4+8.1*2.4+2.4*3*7.2=5.4*2.4+8.1*2.4+2.4*21.6=(5.4+8.1+21.6)*2.4=35.1*2.4=84.24

(5.4-2.4÷3)*1.7 =(5.4-0.8)*1.7 =4.6*1.7 =5*1.7 -0.4*1.7 =8.5-0.68=7.82

解:5.4X2.4 =5.4X(2十0.4) =5.4X2十5.4X0.4 =10.8十216 =12.96

5.4乘1.4除以7.2的简便方法5.4乘1.4除以7.2=5.4*1.4÷7.2=7.56÷7.2=1.05

5.4÷24=0.225,竖式如下: 0. 2 2 5 --------------2 4 / 5. 4 4. 8 ------- 6 0 4 8 ---------- 1 2 0 1 2 0 ---------- 0

=(72÷24)x(75÷15)x(54÷27)=3x05x2=3

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