Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 151 · 40 questions

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

1. 1.18 × 13 =
2. 2.1325 ÷ 25 =
3. 3.Check with nines: 83 × 68 = 5644. Correct or wrong? (a) wrong (b) correct
4. 4.Best estimate of 98 × 8? (a) 8000 (b) 80 (c) 1600 (d) 800
5. 5.567 − 29 =
6. 6.20 × 5 =
7. 7.75 + 48 + 14 + 24 =
8. 8.1950 ÷ 50 =
9. 9.39 × 4 =
10. 10.2 + 9 + 8 + 3 + 7 =
11. 11.105 + 19 =
12. 12.29 + 21 + 37 + 74 =
13. 13.₹20.20 + ₹17.05 =
14. 14.32 × 15 =
15. 15.7 + 3 + 3 + 5 + 5 =
16. 16.208 − 38 =
17. 17.Check with nines: 505 + 524 = 1029. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 961 + 843 = 1804. Correct or wrong? (a) wrong (b) correct
19. 19.31² =
20. 20.Best estimate of 401 × 4? (a) 160 (b) 16000 (c) 1600 (d) 3200
21. 21.20 × 8 =
22. 22.Check with nines: 449 + 492 = 933. Correct or wrong? (a) wrong (b) correct
23. 23.33 + 60 + 77 + 19 =
24. 24.20% of 530 =
25. 25.493 + 27 =
26. 26.885 ÷ 5 =
27. 27.845 ÷ 5 =
28. 28.18 × 19 =
29. 29.24 × 15 =
30. 30.25% of 690 =
31. 31.110 × 4 =
32. 32.18 × 12 =
33. 33.91 × 5 =
34. 34.13 + 89 + 23 + 89 =
35. 35.291 + 87 =
36. 36.5% of 300 =
37. 37.385 ÷ 5 =
38. 38.98 × 50 =
39. 39.Best estimate of 198 × 4? (a) 1600 (b) 80 (c) 8000 (d) 800
40. 40.12 × 15 =

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