0.125*153+12.5*0.25+1.25*2.1怎么简便计算
答案:2 悬赏:60 手机版
解决时间 2021-11-07 19:00
- 提问者网友：蓝琪梦莎
- 2021-11-07 10:36
0.125*153+12.5*0.25+1.25*2.1怎么简便计算
最佳答案
- 五星知识达人网友：人间朝暮
- 2021-11-07 12:07
0.125*153+12.5*0.25+1.25*2.1
=1.25×15.3+1.25×2.5+1.25×2.1
=1.25×(15.3+2.5+2.1)
=1.25×19.9
=1.25×(20-0.1)
=1.25×20-1.25×0.1
=25-0.125
=24.875
=1.25×15.3+1.25×2.5+1.25×2.1
=1.25×(15.3+2.5+2.1)
=1.25×19.9
=1.25×(20-0.1)
=1.25×20-1.25×0.1
=25-0.125
=24.875
全部回答
- 1楼网友：人類模型
- 2021-11-07 12:58
0.125×153+12.5×0.25+1.25×2.1
=0.125×(153+25+21)
=0.125×199
=0.125×200-0.125
=25-0.125
=24.875乘法分配律
=0.125×(153+25+21)
=0.125×199
=0.125×200-0.125
=25-0.125
=24.875乘法分配律
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