急!!!!!今日要做完!maths 野 20 點

陳家汶

2009-08-25 12:28 am

用方程:

1. 120 stamps are divided among Mary,Peter and Betty.If Peter gets half as many stamps as Mary, and Betty gets three times as many as Peter.How many does each get???

No方程:

35% of 4m=???cm
9/2% of 18kg=????g

百分率:

1. The cost of a computer is $ 4500.If it is sold at $3870,what is the loss per cent??????(Loss= ???-???=???? Loss%=???)

2. Eric has an annual income of $1105000.He saves one fifth of it,pays 40% of the remainder for rent and taxes and spends the rest on other items.How much does he spends on the other items??

3.Mary is 20% heavier than Peter and Peter is 10% heavier than Ann.If Peter weights 55kg,by what percentage is Mary heavier than Ann?

回答 (2)

[匿名]

2009-08-25 12:54 am

✔ 最佳答案

1. 120 stamps are divided among Mary,Peter and Betty.If Peter gets half as many stamps as Mary, and Betty gets three times as many as Peter.How many does each get???

Mary:20
Peter:40
Betty:60

35% of 4m=140cm
9/2% of 18kg=0.81kg

1. The cost of a computer is $ 4500.If it is sold at $3870,what is the loss per cent??????(Loss= 4500-3870=630 Loss%=630/4500*100%)

2. Eric has an annual income of $1105000.He saves one fifth of it,pays 40% of the remainder for rent and taxes and spends the rest on other items.How much does he spends on the other items??
$530400

.Mary is 20% heavier than Peter and Peter is 10% heavier than Ann.If Peter weights 55kg,by what percentage is Mary heavier than Ann?
13.88888%

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陳家汶

2009-08-25 1:11 am

要步驟呀

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