用简便方法计算,求过程!谢谢
1个回答
2014-09-20
展开全部
=12.5x3.7+12.5x16+12.5x2.7
=12.5x(3.7+16+2.7)
=12.5x22
=12.5x(20+2)
=12.5x20+12.5x2
=250+25
=275
=12.5x(3.7+16+2.7)
=12.5x22
=12.5x(20+2)
=12.5x20+12.5x2
=250+25
=275
更多追问追答
追问
那个(3.7+16+2.7)不是等干22.4??
追答
=12.5x3.7+12.5x1.6+2.7
=12.5x(2.7+3.7+1.6)
=12.5x8
=100
谢谢你指出我的错误,题目写太快,失误了
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