Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 471 · 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. 1.41² =
2. 2.137 × 4 =
3. 3.Check with nines: 34 × 51 = 1734. Correct or wrong? (a) wrong (b) correct
4. 4.₹94.85 + ₹41.70 =
5. 5.10% of 250 =
6. 6.375 + 39 =
7. 7.16 × 50 =
8. 8.20 × 8 =
9. 9.6 + 5 + 4 + 4 =
10. 10.13 × 15 =
11. 11.136 − 29 =
12. 12.790 ÷ 5 =
13. 13.60 + 29 + 54 + 40 =
14. 14.455 + 38 =
15. 15.49 + 52 + 85 + 85 =
16. 16.13 × 19 =
17. 17.21 + 28 + 86 + 74 =
18. 18.715 ÷ 5 =
19. 19.₹6.85 + ₹5.80 =
20. 20.₹51.10 − ₹42.95 =
21. 21.12 × 19 =
22. 22.505 − 68 =
23. 23.64 + 40 + 60 + 27 =
24. 24.57 + 80 + 44 + 82 =
25. 25.12 + 83 + 29 + 87 =
26. 26.Best estimate of 599 × 3? (a) 180 (b) 18000 (c) 1800 (d) 3600
27. 27.7 + 2 + 9 + 9 + 1 =
28. 28.1200 ÷ 25 =
29. 29.Best estimate of 38 × 42? (a) 16000 (b) 160 (c) 1600 (d) 3200
30. 30.3 + 4 + 1 + 6 =
31. 31.11 + 19 + 16 + 75 =
32. 32.41 × 4 =
33. 33.Best estimate of 18 × 68? (a) 2800 (b) 140 (c) 1400 (d) 14000
34. 34.74 − 48 =
35. 35.12 × 12 =
36. 36.Check with nines: 761 + 830 = 1591. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 285 + 988 = 1273. Correct or wrong? (a) wrong (b) correct
38. 38.Best estimate of 401 × 8? (a) 6400 (b) 32000 (c) 320 (d) 3200
39. 39.4 + 8 + 1 + 2 =
40. 40.13 × 14 =

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