檔案
類別 | 課 程 名 稱 | 教學
題數 | 播放
時間 | 點擊
次數 | 課程
介紹 |
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用美語教國中數學 - 3 |
1 |
1:14 |
111 |
 說明
課 程 介 紹
完全平方數
3. What percentage of the numbers from 1 to 50 have squares that end in the digit 1 ?
(A) 1 (B) 5 (C) 10 (D) 11 (E) 20
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用美語教國中數學 - 6 |
1 |
1:40 |
87 |
說明
課 程 介 紹
加法與乘法
6. Eggs cost 50 cents a dozen for the first 100 dozens. A store buys from a wholesaler and 47 cents a dozen for all those bought in addition to the first 100 dozens. How much does it cost to buy 150 dozen eggs from the wholesaler？
(A) $ 70.50 (B) $ 72.00 (C) $ 73.50 (D) $ 123.50 (E) $ 150.00
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用美語教國中數學 - 9 |
1 |
1:18 |
76 |
說明
課 程 介 紹
三個連續整數
9. If the product of 3 consecutive integers is 120 ,
then the sum of the integers is ______ .
(A) 9 (B) 12 (C) 14 (D) 15 (E) 18
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用美語教國中數學 - 8 |
1 |
1:23 |
52 |
說明
課 程 介 紹
工資的換算
8. A worker is paid r dollars for each hour if he works up to 8 hours a day. For any time worked over 8 hours he is paid at the rate of ( 1.5 ) r dollars an hour. The total amount of dollars the worker will earn if he works 11 hours in a day is ______ .
(A) ( 4.5 ) r (B) ( 5.5 ) r (C) ( 9.25 ) r (D) ( 11 ) r (E) ( 12.5 ) r
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用美語教國中數學 - 7 |
1 |
1:16 |
849 |
說明
課 程 介 紹
正方形的面積
7. If the side of a square increases by 30 % , then its area increases by _____.
(A) 9 % (B) 30 % (C) 60 % (D) 69 % (E) 130 %
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用美語教國中數學 - 12 |
1 |
1:13 |
81 |
說明
課 程 介 紹
正數與負數
12. If x and y are negative , then which of the following statements is ( are ) always true？
Ⅰ. x + y is positive Ⅱ. x y is positive Ⅲ. x - y is positive
(A) Ⅰ only (B) Ⅱ only (C) Ⅲ only (D) Ⅰ and Ⅲ only (E) Ⅱ and Ⅲ only
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用美語教國中數學 - 14 |
1 |
1:02 |
50 |
說明
課 程 介 紹
兩圓的面積比
14. If the ratio of the radii of two circles is 3 to 2 , then the ratio of the areas of the two circles is _________ .
(A) 2 to 3 (B) 3 to 4 (C) 4 to 9 (D) 9 to 4 (E) 3 to 2
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用美語教國中數學 - 18 |
1 |
1:14 |
51 |
說明
課 程 介 紹
完全平方數
18. How many two-digit numbers satisfy the following property : the last digit ( units digit ) of the square of the two-digit number is 8？
(A) none (B) 3 (C) 1 (D) more than 3 (E) 2
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用美語教國中數學 - 19 |
1 |
00:52 |
157 |
說明
課 程 介 紹
二元一次方程式
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用美語教國中數學 - 13 |
1 |
0:48 |
1171 |
說明
課 程 介 紹
比例
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