Key Concepts: Integers are whole numbers (positive, negative, or zero). Add/subtract negative numbers using number line. Multiply/divide: same signs → positive, different signs → negative. BIDMAS/BODMAS order of operations.
Section A: Addition and Subtraction
1. Calculate: [4]
(a) -8 + 5
(b) 3 - (-7)
(c) -12 - 8
(d) -15 + (-6)
Section B: Multiplication and Division
2. Calculate: [4]
(a) -6 × 4
(b) -20 ÷ (-5)
(c) 8 × (-3)
(d) -48 ÷ 6
Section C: Order of Operations
3. Calculate using BIDMAS: [4]
(a) 5 + 3 × 4
(b) (8 - 2) × 3
(c) 20 ÷ 4 + 6
(d) 3 × (5 + 2)² - 10
Section D: Mixed Problems
4. The temperature is -5°C. It drops by 8°C. What is the new temperature? [2]
5. Calculate: -3 × 4 + 15 ÷ (-3) [2]
Total marks: 16
Mark Scheme
1. (a) -3 [1]; (b) 10 [1]; (c) -20 [1]; (d) -21 [1]
2. (a) -24 [1]; (b) 4 [1]; (c) -24 [1]; (d) -8 [1]
3. (a) 5 + 12 = 17 [1]; (b) 6 × 3 = 18 [1]; (c) 5 + 6 = 11 [1]; (d) 3 × 49 - 10 = 137 [1]
4. -5 - 8 = -13°C [2]
5. -12 + (-5) = -17 [2]