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Math
Lower secondary
中一數學：有向數、方程與百分法
有向數四則運算、代入求值、解一元一次方程、百分法與比例。
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1
計算 (-7) + 12 - (-3) 的值。
A
2
B
8
C
-8
D
22
2
計算 (-3) × (-4) ÷ (-2) 的值。
A
-6
B
6
C
-24
D
24
3
計算 (-2)³ 的值。
A
8
B
-8
C
6
D
-6
4
若 a = -2、b = 3，求 2a² - b 的值。
A
5
B
13
C
-11
D
-5
5
解方程 3x - 7 = 14，求 x 的值。
A
7/3
B
7
C
21
D
-7
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