Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 605 · 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. 1.20% of 430 =
2. 2.Best estimate of 202 × 7? (a) 2800 (b) 14000 (c) 1400 (d) 140
3. 3.Best estimate of 78 × 61? (a) 48000 (b) 9600 (c) 4800 (d) 480
4. 4.Best estimate of 79 × 62? (a) 48000 (b) 9600 (c) 4800 (d) 480
5. 5.Best estimate of 298 × 5? (a) 3000 (b) 15000 (c) 1500 (d) 150
6. 6.97 + 97 =
7. 7.32 × 4 =
8. 8.21² =
9. 9.132 + 59 =
10. 10.16 × 13 =
11. 11.41 + 67 =
12. 12.Check with nines: 40 × 15 = 594. Correct or wrong? (a) correct (b) wrong
13. 13.59² =
14. 14.₹9.45 + ₹3.85 =
15. 15.Best estimate of 29 × 59? (a) 180 (b) 3600 (c) 1800 (d) 18000
16. 16.21 × 15 =
17. 17.14 × 15 =
18. 18.₹89.10 + ₹24.50 =
19. 19.557 − 39 =
20. 20.30 × 8 =
21. 21.1 + 8 + 2 + 7 + 9 =
22. 22.Best estimate of 48 × 32? (a) 15000 (b) 3000 (c) 1500 (d) 150
23. 23.40 + 12 + 48 + 43 =
24. 24.39² =
25. 25.Best estimate of 397 × 8? (a) 6400 (b) 3200 (c) 320 (d) 32000
26. 26.Best estimate of 18 × 79? (a) 160 (b) 3200 (c) 1600 (d) 16000
27. 27.19 × 12 =
28. 28.70 × 4 =
29. 29.9 + 5 + 5 + 4 =
30. 30.330 − 57 =
31. 31.19 + 21 + 14 + 87 =
32. 32.Check with nines: 12 × 64 = 768. Correct or wrong? (a) correct (b) wrong
33. 33.44 × 50 =
34. 34.15% of 410 =
35. 35.99 − 79 =
36. 36.25% of 140 =
37. 37.564 − 48 =
38. 38.50% of 80 =
39. 39.12 × 12 =
40. 40.205 − 66 =

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