102*46的簡便計算

102*46的簡便計算


102*46
=(100+2)*46
=4600+92
=4692



0.75×102×2的簡便計算


0.75×102×2=0.75×(100+2)×2=0.75(200+4)=150+3=153



0.45×98怎樣簡便算
急對的加10財富


0.45×98
=0.45X(100-2)
=45-0.9
=44.1