1) If the sum of two numbers is 18 and the difference between the two numbers is4, find the two numbers.
Solution: Let the two numbers be x and y, and x＞y.
2) Without using any measuring tools, astimate the height of the building you are living, and write down the method used.
Please with the steps, no stepsno marks.
Maths
2007-08-19 3:29 am
回答 (1)
2007-08-19 3:52 am
✔ 最佳答案
1) since x>yx=y+4
x+y=18
y+4+y=18
2y+4=18
2y=14
y=7
x=y+4
x=11
2) my height:170 cm (1.7m)
there are 30 floors.
my height + about 30 cm =the height of a floor.
The height of the building
=(170+30) X30 cm
=200X30 cm
=6000cm
=60m
收錄日期: 2021-04-24 09:39:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070818000051KK04351