29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算

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29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算29.5×47.8+62.1×52.2+47.8×32.

29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算
29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算

29.5×47.8+62.1×52.2+47.8×32.6简便计算怎么算

〔29.5+32.6〕*47.8+62.1*52.5=62.1*47.8+62.1*52.5=62.1*(47.8+52.5)

29.5×47.8+62.1×52.2+47.8×32.6
=29.5×47.8+47.8×32.6+62.1×52.2
=47.8*(29.5+32.6)+62.1×52.2
=47.8*62.1+62.1×52.2
=62.1*(47.8+52.2)
=62.1*100
=6210

先提47.8出来就是47.8(29.5+32.6)+62.1乘52.2到这一步之后你就会发现出规律了