7.816乘以1.45加3.14乘以2.184加1.69乘以7.816简便方法怎么做？
答案:2 悬赏:40 手机版
解决时间 2021-04-19 23:03
- 提问者网友：嘚啵嘚啵
- 2021-04-19 03:50
7.816乘以1.45加3.14乘以2.184加1.69乘以7.816简便方法怎么做？
最佳答案
- 五星知识达人网友：怙棘
- 2021-04-19 04:08
7.816*1.45+3.14*2.184+1.69*7.816
=7.816*(1.45+1.69)+3.14*2.184
=7.816*3.14+3.14*2.184
=3.14*(7.816+2.184)
=3.14*10=31.4
=7.816*(1.45+1.69)+3.14*2.184
=7.816*3.14+3.14*2.184
=3.14*(7.816+2.184)
=3.14*10=31.4
全部回答
- 1楼网友：春色三分
- 2021-04-19 05:11
7.816*1.45+3.14*2.184+1.69*7.816
=7.816*1.45+3.14*(10-7.816)+1.69*7.816
=7.816*1.45+31.4-7.816*3.14+7.816*1.69
=7.816*(1.45-3.14+1.69)+31.4
=0+31.4
=31.4
=7.816*1.45+3.14*(10-7.816)+1.69*7.816
=7.816*1.45+31.4-7.816*3.14+7.816*1.69
=7.816*(1.45-3.14+1.69)+31.4
=0+31.4
=31.4
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