
计算下面各题。你认为怎样简便就怎样算。 54.9*0.38,4.05 37.85,1.25*0.7
计算下面各题。你认为怎样简便就怎样算。54.9*0.38,4.0537.85,1.25*0.7...
计算下面各题。你认为怎样简便就怎样算。 54.9*0.38,4.05 37.85,1.25*0.7
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54.9×0.38=20.862
4.05+37.85=41.9
1.25×0.8×0.7
=1×0.7
=0.7
9.8×25=245
6.1×3.6+3.6×3.9
=(6.1+3.9)×3.6
=10×3.6
=36
2.96×40=118.4
4.05+37.85=41.9
1.25×0.8×0.7
=1×0.7
=0.7
9.8×25=245
6.1×3.6+3.6×3.9
=(6.1+3.9)×3.6
=10×3.6
=36
2.96×40=118.4
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