Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 454 · 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. 1.79² =
2. 2.89² =
3. 3.15 × 4 =
4. 4.8 + 2 + 9 + 9 =
5. 5.Best estimate of 299 × 7? (a) 2100 (b) 210 (c) 4200 (d) 21000
6. 6.286 − 29 =
7. 7.357 + 68 =
8. 8.421 − 98 =
9. 9.182 − 79 =
10. 10.345 − 69 =
11. 11.930 ÷ 5 =
12. 12.Best estimate of 102 × 4? (a) 400 (b) 40 (c) 800 (d) 4000
13. 13.50 × 15 =
14. 14.41 × 8 =
15. 15.Best estimate of 698 × 3? (a) 21000 (b) 2100 (c) 4200 (d) 210
16. 16.52 × 50 =
17. 17.30 × 15 =
18. 18.7 + 2 + 2 + 8 =
19. 19.40 × 50 =
20. 20.286 − 86 =
21. 21.₹69.75 − ₹28.45 =
22. 22.₹87.70 + ₹5.20 =
23. 23.64 × 50 =
24. 24.106 − 66 =
25. 25.464 + 29 =
26. 26.₹19.25 + ₹22.55 =
27. 27.15% of 390 =
28. 28.Check with nines: 16 × 79 = 1264. Correct or wrong? (a) correct (b) wrong
29. 29.10 × 15 =
30. 30.469 − 67 =
31. 31.42 + 33 + 79 + 20 =
32. 32.224 + 48 =
33. 33.1 + 6 + 8 + 9 + 7 =
34. 34.70 + 12 + 87 + 41 =
35. 35.54 × 8 =
36. 36.₹80.70 + ₹44.10 =
37. 37.68 × 8 =
38. 38.Best estimate of 97 × 3? (a) 300 (b) 30 (c) 600 (d) 3000
39. 39.Best estimate of 62 × 71? (a) 8400 (b) 4200 (c) 420 (d) 42000
40. 40.59² =

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