Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 296 · 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. 1.40 × 15 =
2. 2.18 × 15 =
3. 3.13 × 11 =
4. 4.49 × 15 =
5. 5.45 × 15 =
6. 6.12 × 11 =
7. 7.Check with nines: 20 × 91 = 1814. Correct or wrong? (a) wrong (b) correct
8. 8.8 + 8 + 6 + 2 =
9. 9.12 × 16 =
10. 10.Best estimate of 398 × 3? (a) 1200 (b) 2400 (c) 120 (d) 12000
11. 11.8 + 5 + 2 + 9 =
12. 12.6 + 4 + 6 + 2 + 1 =
13. 13.64 × 50 =
14. 14.Check with nines: 85 × 62 = 5270. Correct or wrong? (a) wrong (b) correct
15. 15.28 × 50 =
16. 16.Best estimate of 89 × 58? (a) 540 (b) 54000 (c) 5400 (d) 10800
17. 17.326 − 16 =
18. 18.90 × 4 =
19. 19.71² =
20. 20.Best estimate of 19 × 41? (a) 8000 (b) 80 (c) 800 (d) 1600
21. 21.83 × 5 =
22. 22.₹31.55 + ₹25.50 =
23. 23.7 + 5 + 8 + 5 =
24. 24.Check with nines: 772 + 471 = 1239. Correct or wrong? (a) correct (b) wrong
25. 25.₹81.15 − ₹43.35 =
26. 26.₹24.80 + ₹43.75 =
27. 27.Best estimate of 28 × 82? (a) 24000 (b) 240 (c) 4800 (d) 2400
28. 28.294 − 16 =
29. 29.₹92.35 + ₹30.15 =
30. 30.365 + 59 =
31. 31.14 × 15 =
32. 32.73 + 19 + 31 + 56 =
33. 33.2 + 7 + 2 + 8 + 2 =
34. 34.₹96.80 − ₹47.25 =
35. 35.26 × 5 =
36. 36.Best estimate of 802 × 3? (a) 2400 (b) 240 (c) 24000 (d) 4800
37. 37.Check with nines: 26 × 16 = 416. Correct or wrong? (a) wrong (b) correct
38. 38.10% of 630 =
39. 39.81² =
40. 40.₹17.95 + ₹27.55 =

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