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Grade 7_Review

Authored by Anh Trần

Mathematics

7th Grade

Used 1+ times

Grade 7_Review
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪一個是 -5 的絕對值?

-5
0
5
-1

Answer explanation

絕對值是到 0 的距離,因此 |-5| = 5。

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

把 520,000,000 這個數寫成科學記數法是:

0.52×10⁹
5.2×10⁸
52×10⁷
5.2×10⁹

Answer explanation

520 百萬 = 5.2 × 10^8。

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

在數軸上,哪一個點最接近 -1/2?

-1/10
-4/10
-3/10
-5/10

Answer explanation

-1/2 相等於 -5/10。

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪一個算式是正確的:-3y - 3y = ?

-6y
6y
-9y
9y

Answer explanation

-3y - 3y = -6y。

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

如果一個角的餘角比它的補角多 15°,那這個角是多少?

90 - α = (180 - α) + 15
90 - α = (180 - α) - 15
180 - α = (90 - α) + 15
90 - α = (180 - α) - 15

Answer explanation

因為餘角 = 90 - α,補角 = 180 - α。

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

如下圖郵票設計所示,三種郵票邊長關係正確的是:

c = 2d
e = 3a
de + ac = 4ab
de - ac = 2ab

Answer explanation

根據設計圖,這是數量關係。

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

解方程式:3x + 4 = 4x - 5,x =?

1
-9
2
-4

Answer explanation

解方程式得 x = -9。

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