Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 56 · 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. 1.1 + 7 + 4 + 9 + 7 =
2. 2.158 + 17 =
3. 3.102 + 17 =
4. 4.5% of 120 =
5. 5.28 × 50 =
6. 6.165 − 86 =
7. 7.10 × 15 =
8. 8.1650 ÷ 50 =
9. 9.60 × 50 =
10. 10.6 + 3 + 4 + 7 + 6 =
11. 11.437 + 57 =
12. 12.14 × 8 =
13. 13.Check with nines: 68 × 25 = 1698. Correct or wrong? (a) correct (b) wrong
14. 14.56 × 50 =
15. 15.79² =
16. 16.₹48.60 − ₹19.55 =
17. 17.64 × 15 =
18. 18.45 × 15 =
19. 19.69 + 75 + 85 + 79 =
20. 20.Check with nines: 28 × 47 = 1323. Correct or wrong? (a) wrong (b) correct
21. 21.32 × 15 =
22. 22.6 + 1 + 4 + 3 + 4 =
23. 23.705 ÷ 5 =
24. 24.15 × 19 =
25. 25.49² =
26. 26.17 × 13 =
27. 27.Best estimate of 21 × 62? (a) 1200 (b) 12000 (c) 2400 (d) 120
28. 28.20% of 430 =
29. 29.19 + 32 + 65 + 20 =
30. 30.175 ÷ 25 =
31. 31.40 × 5 =
32. 32.Best estimate of 31 × 29? (a) 90 (b) 9000 (c) 1800 (d) 900
33. 33.3 + 3 + 9 + 6 + 1 =
34. 34.51² =
35. 35.Best estimate of 22 × 28? (a) 6000 (b) 60 (c) 600 (d) 1200
36. 36.19² =
37. 37.₹12.55 − ₹10.35 =
38. 38.Best estimate of 39 × 81? (a) 320 (b) 32000 (c) 6400 (d) 3200
39. 39.386 + 19 =
40. 40.Best estimate of 497 × 3? (a) 150 (b) 15000 (c) 1500 (d) 3000

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