數學問題6
回答 (8)
2006-11-17 7:04 am
✔ 最佳答案
小華買了X個蛋撻,他吃了全部的1/4,他的弟妹吃了7個,最後剩下2個,求X的值.(要式) 他吃了全部的1/4，所以吃了 x/4
弟妹吃了7個
總共吃了 x/4 + 7
所以
x – x/4 – 7 = 2
x – x/4 = 9
3x/4 = 9
3x = 36
x = 12個
所以總共有12個
2006-11-17 7:14 am
(1-1/4)x-7=2(本來有1X蛋撻, 吃了1/4即-1/4X=3/4X, 餘3/4X再吃7個即-7, 最後得2個)
3/4x-7=2
3/4x=9
x=9*4/3
x=12
3/4x-7=2
3/4x=9
x=9*4/3
x=12
2006-11-17 7:06 am
X ( 1 - 1/4 ) = 7 + 2
X = 9 / ( 1 - 1/4 )
X = 9 / 3/4
X = 12
X = 9 / ( 1 - 1/4 )
X = 9 / 3/4
X = 12
2006-11-17 7:06 am
1/4X-7=2
1/4X=9
X=9X4
X=36
所以X的值＝36
1/4X=9
X=9X4
X=36
所以X的值＝36
2006-11-17 7:03 am
X-X/4-7=2
4x-x=36
3x=36
x=12
4x-x=36
3x=36
x=12
2006-11-17 7:02 am
X x(1-1/4)-7=2
X x3/4=9
X=9x3/4
X=12
X x3/4=9
X=9x3/4
X=12
收錄日期: 2021-04-12 18:54:30
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