4.9*0.7+18.32用【简便计算】
答案:4 悬赏:20 手机版
解决时间 2021-03-16 14:22
- 提问者网友：姑娘长的好罪过
- 2021-03-15 16:22
4.9*0.7+18.32用【简便计算】
最佳答案
- 五星知识达人网友：深街酒徒
- 2021-03-15 17:39
原式：
4.9×0.7+18.32
=49×0.07+18.32
=（50-1）×0.07+18.32
=3.5-0.07+18.32
=21.82-0.07
=21.75
或
（5-0.1）×0.7+18.32
=3.5-0.07+18.32
=3.5+18.32-0.07
=21.82-0.07
=21.75
4.9×0.7+18.32
=49×0.07+18.32
=（50-1）×0.07+18.32
=3.5-0.07+18.32
=21.82-0.07
=21.75
或
（5-0.1）×0.7+18.32
=3.5-0.07+18.32
=3.5+18.32-0.07
=21.82-0.07
=21.75
全部回答
- 1楼网友：青尢
- 2021-03-15 20:17
4.9*0.7+18.32=(5-0.1)0.7+18.32=3,5-0.07+18.32=2,43+18.32=21.75
- 2楼网友：街头电车
- 2021-03-15 19:36
=(5-0.1)*7+18.32
=35-0.7+18.32
=52.82
=35-0.7+18.32
=52.82
- 3楼网友：你可爱的野爹
- 2021-03-15 18:30
=4.9*0.7+26.1*0.7+0.05=0.7*(4.9*26.1)+0.05=0.7*31+0.05=21.7+0.05=21.75
=4.9*0.7+26*0.7+0.12=0.7*(4.9+26)+0.12=0.7*30.9+0.12=21.63+0.12=21.75
=(5-0.1)*0.7+18+0.32=3.5+18+0.32-0.07=21.5+0.25=21.75
=4.9*0.7+26*0.7+0.12=0.7*(4.9+26)+0.12=0.7*30.9+0.12=21.63+0.12=21.75
=(5-0.1)*0.7+18+0.32=3.5+18+0.32-0.07=21.5+0.25=21.75
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