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標題:
數:百分數折扣(連步驟)
發問:
1. 一本書$60,現以20%出售.求折扣? 2. 一把雨傘標價$120,以$108賣出,折扣%? 3. 一個電話標價$1840,以15%賣出.售價? 4. 機械狗售價$760,以60%賣出.標價?
最佳解答:
1. 折扣是: $60 x ( 1 - 20%) = $60 x 80% = $48 2. 折扣%是: ($108 / $120) x 100% = 90% 3. 售價是: $1840 x (1-15%) =$1840 x 85% = $1564 4. 標價是: $760 / 60% = $1266 2/3
1: $12 2: 10% 3: $1084 4: 1266$|||||1. 60 x20% =60 X 20/100 =12 2. 120 x y% =108 120y/100 =108 120y =108x 100 y=90 =90% 3.1840 x (1-15%)<---the meaning should be (or 1840 x15%) =1840 x 85% =1840 x 85/100 =1564 4. y x 60% =760 y = 760 /(60/100) y = 1266.6 y= (1267)
數:百分數折扣(連步驟)
發問:
1. 一本書$60,現以20%出售.求折扣? 2. 一把雨傘標價$120,以$108賣出,折扣%? 3. 一個電話標價$1840,以15%賣出.售價? 4. 機械狗售價$760,以60%賣出.標價?
最佳解答:
1. 折扣是: $60 x ( 1 - 20%) = $60 x 80% = $48 2. 折扣%是: ($108 / $120) x 100% = 90% 3. 售價是: $1840 x (1-15%) =$1840 x 85% = $1564 4. 標價是: $760 / 60% = $1266 2/3
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其他解答:1: $12 2: 10% 3: $1084 4: 1266$|||||1. 60 x20% =60 X 20/100 =12 2. 120 x y% =108 120y/100 =108 120y =108x 100 y=90 =90% 3.1840 x (1-15%)<---the meaning should be (or 1840 x15%) =1840 x 85% =1840 x 85/100 =1564 4. y x 60% =760 y = 760 /(60/100) y = 1266.6 y= (1267)
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