(1)用简便计算
答案:2 悬赏:30 手机版
解决时间 2021-02-13 07:07
- 提问者网友:留有余香
- 2021-02-12 13:09
(1)用简便计算
最佳答案
- 五星知识达人网友:一把行者刀
- 2021-02-12 13:46
(1)999.9+99.9+9.9+0.9
=1000-0.1+100-0.1+10-0.1+1-0.1
=1111-0.4
=1110.6
(2)497-97×3+37
=497-291+37
=206+37
=243
(3)6.92-11分之8-11分之3+3.18
=6.92+3.18-(8/11+3/11)
=10-1
=9
(4)(9分之1+6分之5-18分之7)×36
=1/9×36+5/6×36-7/18×36
=4+30-14
=20
=1000-0.1+100-0.1+10-0.1+1-0.1
=1111-0.4
=1110.6
(2)497-97×3+37
=497-291+37
=206+37
=243
(3)6.92-11分之8-11分之3+3.18
=6.92+3.18-(8/11+3/11)
=10-1
=9
(4)(9分之1+6分之5-18分之7)×36
=1/9×36+5/6×36-7/18×36
=4+30-14
=20
全部回答
- 1楼网友:逃夭
- 2021-02-12 14:17
(1)999.9+99.9+9.9+0.9
=1000-0.1+100-0.1+10-0.1+1-0.1
=(1) 999.9+99.9+9.9+0.9
=1000-0.1+100-0.1+10-0.1+1-0.1=
=1000-0.1+100-0.1+10-0.1+1-0.1
=(1) 999.9+99.9+9.9+0.9
=1000-0.1+100-0.1+10-0.1+1-0.1=
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