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各位知識朋友 , 入黎幫我手 ar !!! ( 數學F.1 ) (72)
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各位知識朋友 , 入黎幫我手 ar !!!我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!! 1. 40 is 55% of x , x =A. 40 ÷ 55%B. 40 ÷ 45%C. 40 × 55%D. 40 × 45%2. After a 12% pay-rise, Mr.Chan earned $18 480 per month. Howmuch did he earn before the pay-rise?A. $ 15 500B. $ 16 000C. $ 16... 顯示更多 各位知識朋友 , 入黎幫我手 ar !!! 我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!! 1. 40 is 55% of x , x = A. 40 ÷ 55% B. 40 ÷ 45% C. 40 × 55% D. 40 × 45% 2. After a 12% pay-rise, Mr.Chan earned $18 480 per month. How much did he earn before the pay-rise? A. $ 15 500 B. $ 16 000 C. $ 16 500 D. $ 17 000 3. The selling price of a TV set is $ 14 000 during 20% off sale. Find the marked price. A. $ 17 500 B. $ 18 000 C. $ 18 500 D. $ 19 000 4. Mr.Wong spends 45% of his income on rent. If he spent $ 9450 on rent, the amount of his income is A. $ 63 000 B. $ 37 800 C. $ 31 300 D. $ 21 000
最佳解答:
1) x(55%)=40 x=40/55% Ans: A 2) 18480/(1+12%)=16500 Ans: C 3) marked price=14000/(1-20%)=17500 Ans: A 4) Let his income be x x(45%)=9450 x=9450/45%=21000 Ans: D
其他解答:
1. A. 40 ÷ 55% 2. C. $ 16 500 3. A. $ 17 500 4. D. $ 21 000|||||1.A. 40 ÷ 55% 2.C. $ 16 500 3.A. $ 17 500 4.D. $ 21 000
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