Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 241 · 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. 1.9 + 1 + 7 + 9 + 3 =
2. 2.1400 ÷ 25 =
3. 3.Best estimate of 51 × 21? (a) 2000 (b) 10000 (c) 100 (d) 1000
4. 4.Best estimate of 22 × 58? (a) 120 (b) 12000 (c) 1200 (d) 2400
5. 5.71² =
6. 6.274 − 66 =
7. 7.52 × 8 =
8. 8.5 × 15 =
9. 9.346 − 26 =
10. 10.985 ÷ 5 =
11. 11.84 + 26 + 54 + 80 =
12. 12.430 − 78 =
13. 13.45 × 15 =
14. 14.₹14.60 + ₹45.60 =
15. 15.7 + 8 + 5 + 3 + 2 =
16. 16.Best estimate of 78 × 81? (a) 64000 (b) 640 (c) 6400 (d) 12800
17. 17.6 + 1 + 4 + 5 =
18. 18.15 × 18 =
19. 19.16 × 15 =
20. 20.1% of 820 =
21. 21.Best estimate of 203 × 8? (a) 16000 (b) 3200 (c) 1600 (d) 160
22. 22.408 + 37 =
23. 23.68 × 50 =
24. 24.550 ÷ 50 =
25. 25.5% of 530 =
26. 26.376 − 26 =
27. 27.₹26.80 − ₹13.95 =
28. 28.31 × 15 =
29. 29.71 × 5 =
30. 30.85 + 45 + 49 + 78 =
31. 31.₹53.55 + ₹45.80 =
32. 32.₹74.10 + ₹34.95 =
33. 33.₹9.85 + ₹21.35 =
34. 34.Best estimate of 52 × 89? (a) 45000 (b) 9000 (c) 450 (d) 4500
35. 35.81² =
36. 36.469 − 38 =
37. 37.85 + 63 + 63 + 76 =
38. 38.91² =
39. 39.22 × 8 =
40. 40.Best estimate of 49 × 71? (a) 350 (b) 7000 (c) 3500 (d) 35000

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