1.若某矩形的面積為40平方厘米,而它的長及闊分別為8厘米及w厘米,
求w的值. (提示: 矩形的面積=長X闊)
2.湯姆比他的姊姊年輕三歲,且他和他的姊姊歲數之和是23.湯姆今年幾歲? (提示: 設湯姆的歲數為x)
3.某次測驗中,瑪莉得到x分,約翰得到90分,且約翰的分數比瑪莉的兩
倍少10分.求x.
4. 8分之3C = 4分之15 5. 2分之2y-5 = 7又2分之1 6. 一條圓形跑道的半徑是14m. 某人沿著跑道跑了10個圈,咁佢跑了多遠?(取π=7分之 22) 7.一個圓形花圃的四周被籬笆圍繞著. 若籬笆的長度是125.6m,咁花圃的半徑是是多少 ?(取π=7分之22) 8. 169(求正平方根) 9. 729(求正平方根) 10. 1024(求正平方根)
11.一個正方形的面積是49m2次方,咁正方形的邊長是多少? 12.一個正方形的面積是49m2次方,咁正方形的周界是多少? 13.一個長方形的面積是256cm2次方,長是闊的4倍.咁佢的闊係多少?
14.下列各數中,哪些是矩形數? 14a. 41, 45, 48, 53, 57, 61 14b. 67, 72, 73, 89, 92, 95 15.下列各數中,哪些是正方形數? 15a. 36, 45, 54, 64, 72, 81 15b. 94, 100, 117, 121, 130, 144
16.把下列各循環小數化為分數 16a. 0.6=_________________________ 16b. 0.74=________________________ 16c. 0.45=_______________________ 16d. 0.94=_________________________ 16e. 0.148=___________________________ 16f. 0.5678=______________________________
17.九廣鐵路由紅磡站至羅湖站車程需要44分鐘,全程長約35公里,平均時速是多少 公里/小時? (答案取至小數點後三位.) 18.一架飛機以900公里/小時的平均速率飛行,它在08:59起飛,前往2475公里外的地方, 它在甚麼時間到達目的地?
19. If a lorry goes with a speed 70 km/h on a highway, it takes 18 minutes to travel from one end of the highway to the other. How long is the highway?(你可以用中文解答)
20. City A and City B are 120 km apart. A man drives from City A to City B at 40 km/h and returns at 60 km/h. 20a. How long do the two journeys together take?(你可以用中文解答) 20b. What is the average speed for the whole journey?(你可以用中文解答)
21.What percentage of 20 is 9? 22.What percentage of 27m is 15m? 23.Edward weighs 36 kg which is 60% of his father's. What is the weight of his father? (你可以用中文解答)
24.The population of a city was 4550000 in 1993. In 2003 it became 5232500. Find the percentage in crease in population.(你可以用中文解答) 25.The price of a walkman decreases from $1250 to $1062.5. What is the percentage decrease in price?
