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F.1 Mathsmatics H.W.~~快~~

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1.If discount % = 20% , discount = $45 , what is the selling price?2.A game player marked at $780 is sold at a 10% discount . Find the discount .3.In a shop , a doll marked at $480 is sold for $420 in a sale . Find the discount per cent .4. digital clock marked at $230 is sold at a 30% discount . Find... 顯示更多 1.If discount % = 20% , discount = $45 , what is the selling price? 2.A game player marked at $780 is sold at a 10% discount . Find the discount . 3.In a shop , a doll marked at $480 is sold for $420 in a sale . Find the discount per cent . 4. digital clock marked at $230 is sold at a 30% discount . Find the selling price. 5.Mike buys a football at a 15% discount .If he saves $42 , find the marked price of the football.

最佳解答:

1.If discount % = 20% , discount = $45 , what is the selling price? price=45x(1-20%) =45x0.8 =$36 2.A game player marked at $780 is sold at a 10% discount . Find the discount . discount=780x(1+10%) =780x1.1 =$858 3.In a shop , a doll marked at $480 is sold for $420 in a sale . Find the discount percent . discount percent=(420/480)x100% =(7/8)x100% =87.5% 4.digital clock marked at $230 is sold at a 30% discount . Find the selling price. price=230x(1-30%) =230x0.7 =$161 5.Mike buys a football at a 15% discount .If he saves $42 , find the marked price of the football. price=42x(1-15%) =42x0.85 =$35.7

其他解答:

1) 45x(1-20%) =45x80% =$36 2) 780x(1+10%) =780x110% =$858 3) (420/480)x100% =(7/8)x100% =87.5% 4)230x(1-30%) =230x70% =$161 5) 42x(1-15%) =42x85% =$35.7|||||1.If discount % = 20% , discount = $45 , what is the selling price? 45÷20％=225 2.A game player marked at $780 is sold at a 10% discount . Find the discount . 780×10％=78 3.In a shop , a doll marked at $480 is sold for $420 in a sale . Find the discount per cent . (480-420)÷480×100％=12.5％ 4. digital clock marked at $230 is sold at a 30% discount . Find the selling price. 230×(1-30％)=161 5.Mike buys a football at a 15% discount .If he saves $42 , find the marked price of the football. 42÷15％=2805C926699F268FE02