12乘36加120乘420加12乘220巧算
答案:4 悬赏:0
解决时间 2021-03-29 12:58
- 提问者网友:玫瑰园
- 2021-03-28 20:22
12乘36加120乘420加12乘220巧算
最佳答案
- 二级知识专家网友:你可爱的野爹
- 2021-03-28 20:41
解:采用分配律,
原式=12x36+120x420+12x220
=12x(36+4200+220)
=12x4456
=(10+2)x4456
=10x4456+2x4456
=44560+8912
=53472
原式=12x36+120x420+12x220
=12x(36+4200+220)
=12x4456
=(10+2)x4456
=10x4456+2x4456
=44560+8912
=53472
全部回答
- 1楼网友:酒者煙囻
- 2021-03-29 00:17
图
- 2楼网友:十鸦
- 2021-03-28 23:08
应该是:12*360+12*420+12*220
=12*(360+420+220)
=12*1000
=12000
=12*(360+420+220)
=12*1000
=12000
- 3楼网友:躲不过心动
- 2021-03-28 21:46
12×36+120×420+12×220
=120×3.6+120×420+120×22
=120×(3.6+420+22)
=120×445.6
=(100+20)×445.6
=100×445.6+20×445.6
=44560+2×4456
=44560+8912
=44560+10000-1088
=54560-1000-100+12
=53472
=120×3.6+120×420+120×22
=120×(3.6+420+22)
=120×445.6
=(100+20)×445.6
=100×445.6+20×445.6
=44560+2×4456
=44560+8912
=44560+10000-1088
=54560-1000-100+12
=53472
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