Additional Example 1 Additional Example 2

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Additional Example 1 Additional Example 2 3.1 Rate Additional Example 1 Additional Example 2

Additional Example 1 Find the rate of the following. (a) The total rent of a flat for two years is $163 200. (Unit: $/month) Solution (b) Miss Lee types 125 words in 150 seconds. (Unit: words/min) Solution

Solution (a) Rate = $[163 200  (12  2)] / month Additional Example 1 Find the rate of the following. (a) The total rent of a flat for two years is $163 200. (Unit: $/month) (b) Miss Lee types 125 words in 150 seconds. (Unit: words/min) Solution (a) Rate = $[163 200  (12  2)] / month = $(163 200  24) / month Q1(b) = $6 800 / month

Solution (b) Rate = (125  ) words / min = (125  ) words / min Additional Example 1 Find the rate of the following. (a) The total rent of a flat for two years is $163 200. (Unit: $/month) (b) Miss Lee types 125 words in 150 seconds. (Unit: words/min) Solution (b) Rate = (125  ) words / min = (125  ) words / min = 50 words / min

Additional Example 2 Suppose we can exchange 5 Australian dollars for HK$21. (a) How much Australian dollars can we exchange with HK$1? (Give the answer correct to 2 decimal places.) Solution (b) How much Hong Kong dollars can we exchange with 1 Australian dollar? Solution

Additional Example 2 (c) How much Australian dollars can we exchange with HK$189? Solution

Solution (a) HK$1 = Australian dollar = 0.24 Australian dollar Additional Example 2 Suppose we can exchange 5 Australian dollars for HK$21. (a) How much Australian dollars can we exchange with HK$1? (Give the answer correct to 2 decimal places.) (b) How much Hong Kong dollars can we exchange with 1 Australian dollar? (c) How much Australian dollars can we exchange with HK$189? Solution HK$1 = Australian dollar (a) = 0.24 Australian dollar  We can exchange 0.24 Australian dollar with HK$1. Q2(b)

Solution (b) 1 Australian dollar = HK$ = HK$4.2 Additional Example 2 Suppose we can exchange 5 Australian dollars for HK$21. (a) How much Australian dollars can we exchange with HK$1? (Give the answer correct to 2 decimal places.) (b) How much Hong Kong dollars can we exchange with 1 Australian dollar? (c) How much Australian dollars can we exchange with HK$189? Solution 1 Australian dollar = HK$ (b) = HK$4.2  We can exchange HK$4.2 with 1 Australian dollar. Q2(c)

Solution (c) HK$189 = 189  Australian dollars = 45 Australian dollars Additional Example 2 Suppose we can exchange 5 Australian dollars for HK$21. (a) How much Australian dollars can we exchange with HK$1? (Give the answer correct to 2 decimal places.) (b) How much Hong Kong dollars can we exchange with 1 Australian dollar? (c) How much Australian dollars can we exchange with HK$189? Solution HK$189 = 189  Australian dollars (c) = 45 Australian dollars  We can exchange 45 Australian dollars with HK$189.