3又5/3X25又5/2+39.9X6又5/2简便运算
答案:4 悬赏:70 手机版
解决时间 2021-12-02 10:31
- 提问者网友:绫月
- 2021-12-01 14:13
3又5/3X25又5/2+39.9X6又5/2简便运算
最佳答案
- 五星知识达人网友:不如潦草
- 2021-12-01 14:54
三又五分之三乘二十五又五分之二加37.9乘六又五分之二
=3又3/5×25又2/5+37.9×6又2/5
=3.6×(19+6.4)+37.9×6.4
=3.6×6.4+3.6×19+37.9×6.4
=6.4×(3.6+37.9)+3.6×(20-1)
=6.4×41.5+3.6×(20-1)
=6.4×(40+1+0.5)+3.6×(20-1)
=256+6.4+3.2+72-3.6
=256+72+6.4+3.2-3.6
=328+9.6-3.6
=328+6
=334
=3又3/5×25又2/5+37.9×6又2/5
=3.6×(19+6.4)+37.9×6.4
=3.6×6.4+3.6×19+37.9×6.4
=6.4×(3.6+37.9)+3.6×(20-1)
=6.4×41.5+3.6×(20-1)
=6.4×(40+1+0.5)+3.6×(20-1)
=256+6.4+3.2+72-3.6
=256+72+6.4+3.2-3.6
=328+9.6-3.6
=328+6
=334
全部回答
- 1楼网友:未来江山和你
- 2021-12-01 17:32
- 2楼网友:枭雄戏美人
- 2021-12-01 16:05
¼
- 3楼网友:封刀令
- 2021-12-01 15:48
慢慢做
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