41.2*8.1+11*1.25+53.7*1.9 怎样巧算？
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解决时间 2021-04-06 07:55
- 提问者网友：最美的风景
- 2021-04-05 17:27
是最新的
最佳答案
- 五星知识达人网友：空山清雨
- 2021-04-05 18:08
=41.2*(10-8.1)+53.7*8.1+11*1.25
=53.7*8.1+41.2*10-41.2*8.1++11*1.25
=(53.7-41.2)*8.1+412+11*1.25
=12.5*8.1+1.1*1.25+412
=12.5*(8.1+1.1)+412
=12.5*9.2+412
=115+412
=527
=53.7*8.1+41.2*10-41.2*8.1++11*1.25
=(53.7-41.2)*8.1+412+11*1.25
=12.5*8.1+1.1*1.25+412
=12.5*(8.1+1.1)+412
=12.5*9.2+412
=115+412
=527
全部回答
- 1楼网友：长青诗
- 2021-04-05 20:44
41.2×8.1+11×1.25+53.7×1.9
=41.2x10-41.2x1.9+1.1x12.5+53.7x1.9
=412+1.9x(53.7-41.2)+1.1x12.5
=412+1.9x12.5+1.1x12.5
=412+12.5x(1.9+1.1)
=412+12.5x3
=412+37.5
=449.5
- 2楼网友：未来江山和你
- 2021-04-05 19:10
41.2*8.1+11*1.25+53.7*1.9
=41.2*8.1+11*1.25+(41.2+12.5)*1.9
=41.2*8.1+41.2*1.9+11*1.25+12.5*1.9
=41.2*(8.1+1.9)+12.5*(1.1+1.9)
=41.2*10+12.5*3
=412+37.5
=449.5
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