六上康軒數學質數合數與質因數分解

六上康軒數學質數合數與質因數分解

6th Grade

30 Qs

quiz-placeholder

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六上康軒數學質數合數與質因數分解

六上康軒數學質數合數與質因數分解

Assessment

Quiz

Mathematics

6th Grade

Medium

Created by

韻全 新竹縣信勢國小

Used 2+ times

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30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

下面哪一個數是15的質因數?

1
3
10
15

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

下面哪一個是50的質因數分解?

1×50
2×25
2×5×5
5×10

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下面哪一個數不是合數?

41
40
32
16

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

3、4、5、7、11、12、15、16、17,這些數中共有幾個質數?

4個
5個
6個
7個

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

哪一個算式的積是質數?

2×11
3×19
7×31
1×17

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

把90做質因數分解,下面哪一個答案是正確的?

90=9×10
90=2×5×9
90=2×3×15
90=2×3×3×5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下面哪一個數不是質數?

13
15
17
29

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