37.5×7.1+500×0.29+1.1×12.5
=(50-12.5)*7.1+50*2.9+1.1*12.5
=50*(7.1+2.9)-12.5*(7.1-1.1)
=500-12.5*6
=500-75
=425
用简便方法计算:37.5×7.1+500×0.29+1.1×12.5
用简便方法计算:37.5×7.1+500×0.29+1.1×12.5
数学人气:649 ℃时间:2019-11-04 10:33:14
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