Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 505 · 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.Best estimate of 78 × 28? (a) 4800 (b) 2400 (c) 24000 (d) 240
2. 2.453 + 67 =
3. 3.6 + 5 + 5 + 2 =
4. 4.204 + 17 =
5. 5.12 × 18 =
6. 6.Best estimate of 19 × 49? (a) 10000 (b) 100 (c) 1000 (d) 2000
7. 7.26 × 15 =
8. 8.9 + 4 + 6 + 2 =
9. 9.48 × 50 =
10. 10.464 + 98 =
11. 11.243 − 66 =
12. 12.50% of 740 =
13. 13.12 × 17 =
14. 14.50% of 800 =
15. 15.163 − 99 =
16. 16.315 ÷ 5 =
17. 17.89² =
18. 18.487 + 58 =
19. 19.91 × 4 =
20. 20.362 − 96 =
21. 21.360 ÷ 5 =
22. 22.26 + 68 + 72 + 85 =
23. 23.₹32.40 + ₹5.25 =
24. 24.Best estimate of 72 × 72? (a) 9800 (b) 49000 (c) 490 (d) 4900
25. 25.Best estimate of 798 × 6? (a) 480 (b) 48000 (c) 9600 (d) 4800
26. 26.54 × 8 =
27. 27.Best estimate of 18 × 32? (a) 60 (b) 6000 (c) 600 (d) 1200
28. 28.18 × 15 =
29. 29.50 × 50 =
30. 30.Check with nines: 26 × 95 = 2470. Correct or wrong? (a) wrong (b) correct
31. 31.144 + 48 =
32. 32.72 + 42 + 40 + 61 =
33. 33.65 + 48 + 71 + 75 =
34. 34.80 × 4 =
35. 35.1000 ÷ 50 =
36. 36.50 × 15 =
37. 37.24 + 65 + 18 + 49 =
38. 38.67 + 72 + 17 + 89 =
39. 39.Best estimate of 597 × 8? (a) 9600 (b) 48000 (c) 480 (d) 4800
40. 40.82 × 4 =

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