MATH · GRADES 1–10 · GO AT YOUR OWN PACE
Grade 8 math practice
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Grade 8 · Example set
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Answer key
1. -1
Slope = change in y ÷ change in x = (0 − (5)) / (4 − (-1)) = -5/5 = -1.
2. 52
c² = 20² + 48² = 2704. The positive square root is 52 cm.
3. 125
Multiply 5 by itself 3 times: 5 × 5 × 5 = 125.
4. -5
Slope = change in y ÷ change in x = (-29 − (1)) / (9 − (3)) = -30/6 = -5.
5. 20
c² = 12² + 16² = 400. The positive square root is 20 cm.
6. 32
Multiply 2 by itself 5 times: 2 × 2 × 2 × 2 × 2 = 32.
7. -3
Slope = change in y ÷ change in x = (-19 − (-4)) / (4 − (-1)) = -15/5 = -3.
8. 204
c² = 96² + 180² = 41616. The positive square root is 204 cm.
9. 16
Multiply 4 by itself 2 times: 4 × 4 = 16.
10. -3
Slope = change in y ÷ change in x = (-11 − (1)) / (3 − (-1)) = -12/4 = -3.