简便计算 7.5×3/5＋2.5÷5/3 2/9÷[5/6×（
答案:4 悬赏:60 手机版
解决时间 2021-04-04 01:42
- 提问者网友：你给我的爱
- 2021-04-03 12:23
简便计算 7.5×3/5＋2.5÷5/3 2/9÷[5/6×（
最佳答案
- 五星知识达人网友：人類模型
- 2021-04-03 13:46
1。 7.5X(3/5)+2.5除以(5/3)
=7.5X(3/5)+2.5X(3/5)
=(7.5+2.5)X(3/5)
=10X(3/5)
=6.
2。 (2/9)除以[(5/6)X(4/5-2/3)]
解： 因为 [(5/6)X(4/5-2/3)]除以(2/9)
=[(5/6)X(4/5-2/3)]X(9/2)
=(9/2)X(5/6)X(4/5)-(9/2)X(5/6)X(2/3)
=3-5/2
=1/2
所以 (2/9)除以[(5/6)X(4/5-2/3)]=2.
=7.5X(3/5)+2.5X(3/5)
=(7.5+2.5)X(3/5)
=10X(3/5)
=6.
2。 (2/9)除以[(5/6)X(4/5-2/3)]
解： 因为 [(5/6)X(4/5-2/3)]除以(2/9)
=[(5/6)X(4/5-2/3)]X(9/2)
=(9/2)X(5/6)X(4/5)-(9/2)X(5/6)X(2/3)
=3-5/2
=1/2
所以 (2/9)除以[(5/6)X(4/5-2/3)]=2.
全部回答
- 1楼网友：北方的南先生
- 2021-04-03 16:41
7.5×3/5+2.5÷5/3
=7.5×3/5+2.5×3/5
=（7.5+2.5）×3/5
=10×3/5
=6
2/9÷ [ 5/6×（4/5-2/3） ]
=2/9÷ [ 5/6×（12/15-10/15） ]
=2/9÷ [ 5/6×2/15 ]
=2/9×6/5×15/2
=2
=7.5×3/5+2.5×3/5
=（7.5+2.5）×3/5
=10×3/5
=6
2/9÷ [ 5/6×（4/5-2/3） ]
=2/9÷ [ 5/6×（12/15-10/15） ]
=2/9÷ [ 5/6×2/15 ]
=2/9×6/5×15/2
=2
- 2楼网友：骨子里都是戏
- 2021-04-03 15:44
7.5×3/5十2.5x3/5
(7.5十2.5)×3/5
|0x3/5二6追答
(7.5十2.5)×3/5
|0x3/5二6追答
- 3楼网友：底特律间谍
- 2021-04-03 15:08
简便计算
7.5×3/5＋2.5÷5/3
= 7.5x3/5+2.5x3/5
= (7.5+2.5) x3/5
=10x3/5
=6
2/9÷[5/6×（4/5－2/3）]
=2/9÷[4/6-10/18]
=2/9÷[12/18-10/18]
=2/9x18/2
=2
7.5×3/5＋2.5÷5/3
= 7.5x3/5+2.5x3/5
= (7.5+2.5) x3/5
=10x3/5
=6
2/9÷[5/6×（4/5－2/3）]
=2/9÷[4/6-10/18]
=2/9÷[12/18-10/18]
=2/9x18/2
=2
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