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8.9x5.7 89x0.43怎么简便运算

8.9x5.7+89x0.43简便运算=8.9*5.7+8.9*4.3=8.9*(5.7+4.3)=8.9*10=89

3.08X0.43的简便运算3.08X0.43=0.43*(3+0.08)=0.43*3+0.43*0.08=1.3244

6.42*5.7+64.2*0.43=6.42*5.7+6.42*10*0.43=6.42*(5.7+4.3)=6.42*10=64.2

3.42*5.7=3.42*(6-0.3)=20.52-1.026=19.394.32*0.43=(30+2)*0.43=12.6-0.86=11.74.

原式=5.7x(8.9+2.1-1)=5.7x(11-1)=5.7x10=57 供参考.

3.42x5.7+3+2x0.43=3.42x5.7+34.2x0.43=3.42*(5.7+4.3)=3.42*10=34.2

5.6x69.32+138.64x0.05+693.2x0.43=69.32x(5.6+2x0.05+10x0.43)=69.32x(5.6+0.1+4.3)=69.32x10=693.2

0.43x5.3+ 5.7x0.53=0.43*5.3+0.57*5.3=5.3*(0.43+0.57)=5.3*1=5.3

0.32*5.7+3.2*0.43=0.32*5.7+0.32*4.3=0.32*(5.7+4.3)=0.32*10=3.2

3.9*0.43+0.39*5.7 =3.9*0.43+3.9*0.57=3.9x(0.43+0.57)=3.9x1=3.9

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