五道脱式计算题要简便计算!(最好有答案)

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五道脱式计算题要简便计算!(最好有答案)
五道脱式计算题
要简便计算!(最好有答案)

五道脱式计算题要简便计算!(最好有答案)
0.7*12.5*8. 196.7/2.5/4. 4.6*12+5.5*12—0.1*12
=0.8*12.5*0.7 =196.7/(2.5*4). =12*(4.6+5.5—0.1)
=10*0.7 =196.7/10. =12*10
=7 =19.7. =120
64.8*100.1 7.5+47.8+2.5
=64.8*(100+0.1) =7.5+2.5+47.8
=64.8*100+64.8*0.1 =10+47.8
=6840+6.48 =57.8
=6846.48
注:/等于除以,*等于乘以