Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 821 · 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. 1.7 + 3 + 9 + 3 =
2. 2.Check with nines: 985 + 167 = 1152. Correct or wrong? (a) wrong (b) correct
3. 3.15% of 320 =
4. 4.117 + 87 =
5. 5.11 × 16 =
6. 6.50 + 30 + 16 + 14 =
7. 7.Best estimate of 82 × 28? (a) 24000 (b) 2400 (c) 4800 (d) 240
8. 8.493 + 98 =
9. 9.478 − 67 =
10. 10.29² =
11. 11.935 ÷ 5 =
12. 12.16 × 17 =
13. 13.5 + 1 + 3 + 5 + 5 =
14. 14.1% of 250 =
15. 15.Best estimate of 28 × 88? (a) 27000 (b) 5400 (c) 270 (d) 2700
16. 16.₹28.10 − ₹20.65 =
17. 17.Best estimate of 61 × 28? (a) 180 (b) 3600 (c) 18000 (d) 1800
18. 18.45 × 5 =
19. 19.62 × 8 =
20. 20.1 + 3 + 8 + 7 =
21. 21.3 + 7 + 2 + 2 =
22. 22.Check with nines: 88 × 99 = 8712. Correct or wrong? (a) wrong (b) correct
23. 23.48 × 5 =
24. 24.53 × 5 =
25. 25.50% of 410 =
26. 26.45 + 70 + 80 + 81 =
27. 27.347 + 89 =
28. 28.41² =
29. 29.Check with nines: 82 × 78 = 6399. Correct or wrong? (a) correct (b) wrong
30. 30.6 + 7 + 7 + 3 =
31. 31.21² =
32. 32.8 × 15 =
33. 33.121 × 4 =
34. 34.6 + 1 + 2 + 5 + 8 =
35. 35.9 × 15 =
36. 36.29² =
37. 37.12 × 16 =
38. 38.51 + 53 + 32 + 65 =
39. 39.Best estimate of 399 × 5? (a) 200 (b) 2000 (c) 20000 (d) 4000
40. 40.₹96.05 − ₹13.10 =

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