Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 251 · 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. 1.1% of 620 =
2. 2.51² =
3. 3.Best estimate of 501 × 4? (a) 200 (b) 4000 (c) 2000 (d) 20000
4. 4.11 × 15 =
5. 5.143 − 36 =
6. 6.12 × 15 =
7. 7.79² =
8. 8.Best estimate of 42 × 61? (a) 4800 (b) 240 (c) 2400 (d) 24000
9. 9.93 × 4 =
10. 10.Best estimate of 58 × 59? (a) 7200 (b) 36000 (c) 360 (d) 3600
11. 11.42 × 4 =
12. 12.130 − 59 =
13. 13.Check with nines: 704 + 919 = 1622. Correct or wrong? (a) wrong (b) correct
14. 14.508 − 69 =
15. 15.42 + 85 + 38 + 66 =
16. 16.Best estimate of 62 × 61? (a) 36000 (b) 3600 (c) 7200 (d) 360
17. 17.18 × 18 =
18. 18.₹88.30 + ₹12.95 =
19. 19.11 × 18 =
20. 20.261 + 99 =
21. 21.6 + 4 + 4 + 8 =
22. 22.59² =
23. 23.51 × 5 =
24. 24.28 × 15 =
25. 25.165 − 86 =
26. 26.₹5.20 + ₹32.70 =
27. 27.Best estimate of 803 × 5? (a) 4000 (b) 40000 (c) 8000 (d) 400
28. 28.Check with nines: 14 × 28 = 392. Correct or wrong? (a) wrong (b) correct
29. 29.16 × 15 =
30. 30.136 + 69 =
31. 31.31 × 50 =
32. 32.286 + 48 =
33. 33.79² =
34. 34.80 + 29 + 44 + 74 =
35. 35.50% of 350 =
36. 36.110 ÷ 5 =
37. 37.46 × 8 =
38. 38.13 × 13 =
39. 39.5 × 15 =
40. 40.39 × 4 =

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