求問數學問題-死人罧樓 (10個點數)
2008-12-10 6:15 am
The total age of Hebrew and his son is 51. 3 years ago, Hebrew is 8 times as old as his son. Find the current age of Hebrew's son. "答案是8-只求列式" 請一步一步地列式
回答 (2)
2008-12-10 6:47 am
Let X be the current age of Hebrew's son.
51-X-3 = 8(X-3)
51-X-3 = 8X-24
51-3 = 8X X-24
48 24 = 9X
72 = 9X
72/9 = 9x/9
8 = X
/ = 除號
51-X-3 = 8(X-3)
51-X-3 = 8X-24
51-3 = 8X X-24
48 24 = 9X
72 = 9X
72/9 = 9x/9
8 = X
/ = 除號
2008-12-10 6:21 am
先假設Hebrew的兒子現在是x歲。
根據"The total age of Hebrew and his son is 51",
那麼hebrew的現年紀是(51-x)歲。
再睇3年前, hebrew的兒子應該係(x -3)歲,
hebrew應該就係 (51-x-3)歲吧。
最後，根據"Hebrew is 8 times as old as his son", 應可把他們寫作方程式。自己試試吧。
根據"The total age of Hebrew and his son is 51",
那麼hebrew的現年紀是(51-x)歲。
再睇3年前, hebrew的兒子應該係(x -3)歲,
hebrew應該就係 (51-x-3)歲吧。
最後，根據"Hebrew is 8 times as old as his son", 應可把他們寫作方程式。自己試試吧。
參考: 小六maths
收錄日期: 2021-04-13 16:18:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081209000051KK01782