
數學問題集
Authored by Hsiaowen Hsu
Mathematics
8th Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
我們估計的誤差從 1、0.1 到 0.01,越來越小,如果我們不想一直找下去,先把這個數字紀錄為 √34,請做根號 34。因此,√34 x √34 = ______,也就是:√34² = ______。
34
33
35
36
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
請寫出下面數字的平方根 (一正一負)。
±2
±3
±4
±5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
√2 ÷ √3 會等於什麼呢?會不會是 √2 ÷ 3 呢?
√(2/3)
√(3/2)
2/√3
√2/3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
請將下面的根號數有理化。
選項 A: \( \frac{\sqrt{2}}{2} \)
選項 B: \( \sqrt{2} \)
選項 C: \( 2\sqrt{2} \)
選項 D: \( \frac{2}{\sqrt{2}} \)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
請比較 $5\sqrt{4}$ 和 $4\sqrt{6}$ 的大小。做法1:先平方再比大小。
$5\sqrt{4} > 4\sqrt{6}$
$5\sqrt{4} < 4\sqrt{6}$
$5\sqrt{4} = 4\sqrt{6}$
無法比較
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用所附的乘方開方表,求出下列各數的近似值。 $(1) \sqrt{46} =$ _______.
6.782330
6.500000
6.900000
7.000000
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用所附的乘方開方表,求出下列各數的近似值。 $(2) \sqrt{1764} =$ _______.
42
40
44
38
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