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發表 冷風∼∼ 於 星期三 七月 12, 2006 4:44 pm

爺爺*0.4=小丁的24
兩邊都除於0.4
爺爺=24/0.4=60
60-24=36
相差36歲


哥哥是弟弟的3.3倍
假設弟弟有1份...哥哥就有3.3倍
3.3份-1份=2.3份(兄弟錢的差..也是460元)
460/2.3=200(1份的錢..也是弟弟的錢)
200*3.3=660(哥哥的錢)

[數學]help

發表 陳怡評 於 星期三 七月 12, 2006 1:41 pm

小丁今年24歲,是爺爺的0.4倍,問兩人相差幾歲?

哥哥錢是弟弟3.3倍,只知兄弟相差460元,問兩人各有多少錢?

邊長總和為152公分的長方體,長比寬多4公分,高比寬少2公分,求此長方體的體積?