Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 301 · 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. 1.21² =
2. 2.94 × 50 =
3. 3.Best estimate of 51 × 21? (a) 100 (b) 2000 (c) 10000 (d) 1000
4. 4.79 × 50 =
5. 5.32 × 4 =
6. 6.6 + 7 + 4 + 6 =
7. 7.Best estimate of 71 × 81? (a) 11200 (b) 56000 (c) 5600 (d) 560
8. 8.40 × 15 =
9. 9.Best estimate of 48 × 69? (a) 7000 (b) 3500 (c) 350 (d) 35000
10. 10.6 + 6 + 8 + 4 =
11. 11.30 × 4 =
12. 12.59² =
13. 13.Check with nines: 567 + 940 = 1506. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 665 + 971 = 1636. Correct or wrong? (a) wrong (b) correct
15. 15.5 + 5 + 9 + 7 + 2 =
16. 16.486 + 68 =
17. 17.67 + 35 + 20 + 44 =
18. 18.72 + 17 + 38 + 44 =
19. 19.61² =
20. 20.457 − 88 =
21. 21.Best estimate of 198 × 9? (a) 18000 (b) 3600 (c) 1800 (d) 180
22. 22.408 + 27 =
23. 23.15% of 570 =
24. 24.8 + 4 + 6 + 4 + 2 =
25. 25.54 + 30 + 19 + 55 =
26. 26.258 − 16 =
27. 27.25 × 5 =
28. 28.Best estimate of 701 × 7? (a) 9800 (b) 4900 (c) 490 (d) 49000
29. 29.₹83.05 + ₹27.05 =
30. 30.250 + 47 =
31. 31.355 ÷ 5 =
32. 32.₹57.10 + ₹18.40 =
33. 33.86 + 61 + 63 + 26 =
34. 34.387 + 49 =
35. 35.14 × 17 =
36. 36.41² =
37. 37.45 × 15 =
38. 38.375 ÷ 25 =
39. 39.113 − 48 =
40. 40.352 + 98 =

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