A2-digit number is divisible by both 2 and 5.
Half this number is less than 6 times the rens digit of the number by
4. find this 2-digit number.
請列式計算
maths s.1
2006-12-26 1:24 am
回答 (3)
2006-12-26 1:30 am
✔ 最佳答案
Since the 2-digit number is divisible by both 2 and 5, so it must has unit digit = 0 (i.e., divisible by 10)
Let the tens digit of the number = y
and the number be 10y
(10y)/2 + 4 = 6y
5y + 4 = 6y
4 = y
y = 4
The required number = 4 (10) = 40
參考: me
2006-12-26 2:46 am
Since the 2-digit number is divisible by both 2 and 5,
so it must has unit digit = 0 (i.e., divisible by 10)
Let the tens digit of the number = y
and the number be 10y
(10y)/2 + 4 = 6y
5y + 4 = 6y
4 = y
y = 4
The required number = 4 (10) = 40
參考資料:
so it must has unit digit = 0 (i.e., divisible by 10)
Let the tens digit of the number = y
and the number be 10y
(10y)/2 + 4 = 6y
5y + 4 = 6y
4 = y
y = 4
The required number = 4 (10) = 40
參考資料:
2006-12-26 1:40 am
(10y)/2 + 4 = 6y
5y + 4 = 6y
4 = y
5y + 4 = 6y
4 = y
收錄日期: 2021-04-12 22:49:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061225000051KK02516