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數學問題集

Authored by Hsiaowen Hsu

Mathematics

8th Grade

數學問題集
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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

Media Image

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

Media Image

√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

Media Image

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

Media Image

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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