PP-T2-DS182

[Huang Hsin-Yi]

182. 17777-!-item-!-187;#058&011599
If m and r are two numbers on a number line, what is the value of r ?

(1) The distance between r and 0 is 3 times the distance between m and 0 .

(2) 12 is halfway between m and r.

Ans:E

這題我是這樣解

(1) r=3m

(2) r-12=12-m

(1)(2) r=18 m=6

選C不知那裡錯了

[小花]

請參考
http://www.formosamba.com/phpBB3/viewtopi ... wo+numbers

[Huang Hsin-Yi]

謝謝囉