Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 508 · 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. 1.75 × 8 =
2. 2.Best estimate of 22 × 32? (a) 6000 (b) 60 (c) 1200 (d) 600
3. 3.91² =
4. 4.20% of 20 =
5. 5.17 × 11 =
6. 6.13 × 15 =
7. 7.39² =
8. 8.259 + 18 =
9. 9.795 ÷ 5 =
10. 10.39² =
11. 11.90 × 5 =
12. 12.55 − 27 =
13. 13.135 × 4 =
14. 14.Check with nines: 61 × 80 = 4880. Correct or wrong? (a) wrong (b) correct
15. 15.Best estimate of 698 × 7? (a) 9800 (b) 49000 (c) 4900 (d) 490
16. 16.497 − 36 =
17. 17.₹81.05 + ₹11.55 =
18. 18.Best estimate of 78 × 79? (a) 640 (b) 64000 (c) 6400 (d) 12800
19. 19.25% of 130 =
20. 20.4 + 5 + 7 + 3 + 2 =
21. 21.30 × 50 =
22. 22.49² =
23. 23.3 + 7 + 3 + 5 =
24. 24.11 × 18 =
25. 25.15% of 790 =
26. 26.31² =
27. 27.455 ÷ 5 =
28. 28.Best estimate of 702 × 6? (a) 8400 (b) 420 (c) 42000 (d) 4200
29. 29.64 × 4 =
30. 30.49² =
31. 31.49 × 5 =
32. 32.76 × 50 =
33. 33.₹57.25 + ₹41.25 =
34. 34.Check with nines: 781 + 708 = 1488. Correct or wrong? (a) wrong (b) correct
35. 35.125 ÷ 25 =
36. 36.Best estimate of 62 × 91? (a) 10800 (b) 5400 (c) 540 (d) 54000
37. 37.540 − 47 =
38. 38.660 ÷ 5 =
39. 39.9 × 15 =
40. 40.55 × 15 =

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