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標題:
Form Three Maths
發問:
Find the new value for each of the following. a) 360 decreases by 25%, and then increases by 20%. b) 52 increases by 4% , and then increases by 25%. c) 100 increases by 10%, and then decreases by 12%. d) 210 decreases by 14%, and then decreases by 50%.
最佳解答:
其他解答:1C924F1C0172E337
Form Three Maths
發問:
Find the new value for each of the following. a) 360 decreases by 25%, and then increases by 20%. b) 52 increases by 4% , and then increases by 25%. c) 100 increases by 10%, and then decreases by 12%. d) 210 decreases by 14%, and then decreases by 50%.
最佳解答:
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a) 360x(1-25%)+[360x(1-25%)x20%] =270+54 =327 b) 52x(1+4%)- [52x(1+4%)x25%] =54.08-13.52 =40.56 c) 100x (1+10%) - [100x(1+10%)x12%] =110-13.2 =96.8 d) 210x(1-14%)+[210x(1-14%)x50%] =180.6-90.3 =45.15 2007-10-04 18:41:44 補充： a)360x(1-25%) [360x(1-25%)x20%]=270 54=324sorry打錯, 324先岩其他解答:1C924F1C0172E337
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