38×24+12×24+24
=(38+12)×24+24
=50×24+24
=1200+24
=1224
55×12
=(50+5)×12
=50×12+5×12
=600+60
=660
怎么简便计算：要递等式：38×24+12×24+24 55×12
怎么简便计算：要递等式：38×24+12×24+24 55×12
是38×24+12×24+24
55×12
是38×24+12×24+24
55×12
数学人气：767 ℃时间：2019-09-24 18:31:08
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