

第二學期考試前溫習 (第1-8章)
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
K Lau
Used 3+ times
FREE Resource
8 Slides • 15 Questions
1
第二學期考試前溫習 (第1-8章)

2
Ch 1
3
Multiple Choice
把540寫成質因數連乘式,並以指數記數法表示。
2 × 3 × 9 × 10
2 × 2 × 3 × 3 × 3 × 5
22 × 33 × 5
3 × 5 × 62
4
H.C.F. (怕死): 個個有先要, 要最少 ; L.C.M. (貪心): 什麼都要, 要最多
5
Multiple Choice
求 24 × 3 × 7 及 2 × 33 × 7 的H.C.F. 和L.C.M.。
H.C.F. = 24 × 33 × 7
L.C.M. =2 × 3 × 7
H.C.F.= 25 × 34 × 72
L.C.M. 2 × 3 × 7
H.C.F. = 2 × 3 × 7
L.C.M. = 24 × 33 × 7
H.C.F. = 2 × 3 × 7
L.C.M. = 25 × 34 × 72
6
同號累積仍同號 異號抵銷跟大數
7
Multiple Choice
圖中,A、B和C都是三個標在數線上的有向數。以下哪個數式必為正數?
A – B
B – C
A + B
A + C
8
Multiple Choice
下列哪個數式的結果的正負號與其餘的不相同?
(+2)(–2)
(–2) – 2
–[4 + (–2)]
-(+8)/(-2)
9
Ch3
10
Multiple Choice
某班有x名學生,其中一半學生配戴眼鏡。若有y名男生配戴眼鏡,求該班中配戴眼鏡的女生人數。
2x+y
2x−y
2x+y
2x−y
11
Multiple Choice
考慮公式 S=3(1−r)a 。 若a = 2及r = 1/3, 求S的值。
1
4/3
2
3
12
Ch4
13
Multiple Choice
下列哪個方程的根是19?
x + 19 = 0
19x = 1
19x+1=0
19x−1=0
14
Multiple Choice
詠雯現年x歲。志輝的年齡是詠雯的兩倍。志輝3年後將會是37歲。下列哪個方程可用來求x的值?
2x – 3 = 37
2x + 3 = 37
2(x – 3) = 37
2(x + 3) = 37
15
Multiple Choice
慧玲解方程 –3(1 + x) = 5 – 2x時,做法如下︰
第一行︰ – 3 – 3x = 5 – 2x
第二行︰ –3 – x = 5
第三行︰ x = 5 + 3
第四行︰ x = 8
判斷慧玲由哪一行開始出現錯誤。
第一行
第二行
第三行
第四行
16
17
Multiple Choice
圖中,AC與BD相交於E。求陰影區域的面積。
37.5 cm2
39.75 cm2
40.25 cm2
52.5 cm2
18
Multiple Choice
圖中顯示一個正六角柱。把該角柱沿着虛線切割,如下所示。所得的截面是甚麼圖形?
六邊形
長方形
梯形
平行四邊形
19
Multiple Choice
圖中顯示一個總表面面積為384 m2的正方體。求它的體積。
512 m3
256 m3
64 m3
48 m3
20
21
Multiple Choice
考慮多項式9 + 8xy5 – 7a3b2 – 6a6b。求項數和次數為5的項的係數。
項數 = 3
所求的係數= -7
項數 = 3
所求的係數= 8
項數 = 4
所求的係數= -7
項數 = 4
所求的係數= 8
22
Multiple Choice
(4a – 6) – (–5 – 6a) =
9a
–2a + 1
10a – 1
10a + 1
23
Multiple Choice
展開 –a(3a – b)。
2a + b
–3a2 – b
–3a2 + ab
–3a2 – ab
第二學期考試前溫習 (第1-8章)

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