Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 746 · 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 × 15 =
2. 2.₹36.65 − ₹10.60 =
3. 3.370 + 29 =
4. 4.35 × 50 =
5. 5.14 + 34 + 32 + 17 =
6. 6.15 × 15 =
7. 7.20% of 830 =
8. 8.₹50.85 − ₹7.15 =
9. 9.41² =
10. 10.Best estimate of 198 × 4? (a) 1600 (b) 8000 (c) 80 (d) 800
11. 11.900 ÷ 5 =
12. 12.4 × 15 =
13. 13.19 × 11 =
14. 14.60 × 4 =
15. 15.Check with nines: 220 + 915 = 1135. Correct or wrong? (a) correct (b) wrong
16. 16.64 × 8 =
17. 17.₹99.25 − ₹21.90 =
18. 18.89² =
19. 19.34 × 15 =
20. 20.49 + 99 =
21. 21.96 × 4 =
22. 22.₹98.10 − ₹29.90 =
23. 23.130 − 86 =
24. 24.17 × 18 =
25. 25.Check with nines: 52 × 83 = 4316. Correct or wrong? (a) wrong (b) correct
26. 26.Best estimate of 82 × 92? (a) 720 (b) 72000 (c) 7200 (d) 14400
27. 27.331 + 57 =
28. 28.15 × 4 =
29. 29.106 × 4 =
30. 30.29 × 5 =
31. 31.46 × 15 =
32. 32.₹34.60 − ₹12.15 =
33. 33.Best estimate of 49 × 88? (a) 9000 (b) 4500 (c) 450 (d) 45000
34. 34.1900 ÷ 50 =
35. 35.Best estimate of 89 × 18? (a) 18000 (b) 180 (c) 1800 (d) 3600
36. 36.68 + 35 + 58 + 43 =
37. 37.63 × 8 =
38. 38.9 × 15 =
39. 39.77 × 50 =
40. 40.108 − 69 =

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