標題:
Form 1 ratios...(show step)
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最佳解答:
1)1 1/2 : 1/2 = 3/2 : 1/2 = 3:1 2)5/9 : 2 1/3 = 5/9 : 7/3 = 5/9 : 21/9 = 5 : 21 3)1 3/4 : 4 2/3 = 7/4 : 14/3 = 21/12 : 56/ 12 = 21 : 56 = 3 : 7 4)0.2 : 0.3 = y : 15 0.2/0.3 = y/15 2/3 = y/15 y = 2/3 x 15 y = 10 5)4 : 2/3 = 2 : y 12 : 2 = 2 : y 6 : 1 = 2 : y 6/1 = 2/y y = 2/6 y = 1/3 6)y : 2 = 1/2 : 4 y : 2 = 1 : 8 y/2 = 1/8 y = 1/8 x 2 y = 1/4 7) the ratio of the selling price of calculator A to that of calculator B is $ 136 : $ 150 68 : 75 8) as 1 m = 100cm, so 6m = 600cm the ratio of the length of the mini-bus to that of it's model is 6m : 30cm = 600cm : 30cm = 20 : 1 9a) the ratio of the number of students who wear glasses to that of the whole class is 20 : 42 = 10 : 21 9b) the number of students who do not waear glasses is (42 - 20) = 22 students The ratio of the number of students who do not wear glasses to that of the whole class is 22 : 42 = 11 : 21 9c) The ratio of the number of students who wear glasses to those who do not is 20 : 22 = 10 : 11 10) as 1 km = 1000m, so 12 3/10km = 12300m 95000m : 12 3/10km = 95000m : 12300m = 95 : 123 11) as 1kg = 1000g, so 1.035kg = 1035g 1.035kg : 150 1/4g = 1035g : 150 1/4g = 1035 : 601/4 = 4140 / 601 12) as 1 hour = 60 mins, so 1/12 hour = 1/12 x 60 = 5 mins 13 1/5mins : 1/12hour = 13 1/5mins : 5mins = 66/5 : 5= 66 : 25
其他解答:
Form 1 ratios...(show step)
發問:
此文章來自奇摩知識+如有不便請留言告知
1)1 1/2 : 1/22)5/9 : 2 1/33)1 3/4 : 4 2/3--------------------------------------------------------------------------------find y:4)0.2 : 0.3 = y : 155)4 : 2/3 = 2 : y6)y : 2 = 1/2 : 4--------------------------------------------------------------------------------7)Calculator A & calculator B... 顯示更多 1)1 1/2 : 1/2 2)5/9 : 2 1/3 3)1 3/4 : 4 2/3 -------------------------------------------------------------------------------- find y: 4)0.2 : 0.3 = y : 15 5)4 : 2/3 = 2 : y 6)y : 2 = 1/2 : 4 -------------------------------------------------------------------------------- 7)Calculator A & calculator B are sold at $136 and $150 respectively.Find the ratio of the selling price of calculator A to that of calculator B. 8)The length of a mini-bus and it's model are 6m and 30cm respectively.Find the ratio of the length of the mini-bus to that of it's model. 9)There are 42 students in S1B where 20 of them wear glasses. a)Find the ratio of the number of students who wear glasses to that of the whole class. b)Find the ratio of the number of students who do not wear glasses to that of the whole class. c)Find the ratio of the number of students who wear glasses to those who do not. -------------------------------------------------------------------------------- 10)95000m : 12 3/10km 11)1.035kg : 150 1/4g 12)13 1/5mins : 1/12hour最佳解答:
1)1 1/2 : 1/2 = 3/2 : 1/2 = 3:1 2)5/9 : 2 1/3 = 5/9 : 7/3 = 5/9 : 21/9 = 5 : 21 3)1 3/4 : 4 2/3 = 7/4 : 14/3 = 21/12 : 56/ 12 = 21 : 56 = 3 : 7 4)0.2 : 0.3 = y : 15 0.2/0.3 = y/15 2/3 = y/15 y = 2/3 x 15 y = 10 5)4 : 2/3 = 2 : y 12 : 2 = 2 : y 6 : 1 = 2 : y 6/1 = 2/y y = 2/6 y = 1/3 6)y : 2 = 1/2 : 4 y : 2 = 1 : 8 y/2 = 1/8 y = 1/8 x 2 y = 1/4 7) the ratio of the selling price of calculator A to that of calculator B is $ 136 : $ 150 68 : 75 8) as 1 m = 100cm, so 6m = 600cm the ratio of the length of the mini-bus to that of it's model is 6m : 30cm = 600cm : 30cm = 20 : 1 9a) the ratio of the number of students who wear glasses to that of the whole class is 20 : 42 = 10 : 21 9b) the number of students who do not waear glasses is (42 - 20) = 22 students The ratio of the number of students who do not wear glasses to that of the whole class is 22 : 42 = 11 : 21 9c) The ratio of the number of students who wear glasses to those who do not is 20 : 22 = 10 : 11 10) as 1 km = 1000m, so 12 3/10km = 12300m 95000m : 12 3/10km = 95000m : 12300m = 95 : 123 11) as 1kg = 1000g, so 1.035kg = 1035g 1.035kg : 150 1/4g = 1035g : 150 1/4g = 1035 : 601/4 = 4140 / 601 12) as 1 hour = 60 mins, so 1/12 hour = 1/12 x 60 = 5 mins 13 1/5mins : 1/12hour = 13 1/5mins : 5mins = 66/5 : 5= 66 : 25
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