1.蘋果30個,梨10個,梨佔all水果的百分之幾?
2.梨500個,有50個是壞,好的梨佔all的_____%?
aaccccaa數學
2012-04-03 4:24 pm
回答 (2)
2012-04-04 6:58 am
1.
蘋果30個,
梨10個,
梨佔all水果的百分之幾? <=梨/all水果 再x100%
共有生果 = 30+10 =40個
10/40 x100%
=1/4 x100%
= 25%
##如果想一條式過就: 10/(30+10) x100%
2.
梨500個,
50個壞,
好的梨佔all梨的_____%?<=搵左好梨先
好梨 = 500 - 50 = 450個
(=好梨/all 梨 x100%)
450/500 x 100%
=9x10%
=90%
##如果想一條式過就: (500-50)/500 x100%
蘋果30個,
梨10個,
梨佔all水果的百分之幾? <=梨/all水果 再x100%
共有生果 = 30+10 =40個
10/40 x100%
=1/4 x100%
= 25%
##如果想一條式過就: 10/(30+10) x100%
2.
梨500個,
50個壞,
好的梨佔all梨的_____%?<=搵左好梨先
好梨 = 500 - 50 = 450個
(=好梨/all 梨 x100%)
450/500 x 100%
=9x10%
=90%
##如果想一條式過就: (500-50)/500 x100%
2012-04-03 5:26 pm
蘋果30個,梨10個,梨佔all水果的百分之幾?生果總數 = 30+10 = 40梨 = 10/40= 25% 梨500個,有50個是壞,好的梨佔all的_____%?好的梨 = 500 - 50 = 450= 450/500 =90%
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120403000051KK00133