Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 338 · 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. 1.21² =
2. 2.₹36.65 − ₹36.25 =
3. 3.1 + 1 + 1 + 9 =
4. 4.Best estimate of 31 × 41? (a) 2400 (b) 120 (c) 12000 (d) 1200
5. 5.Check with nines: 98 × 96 = 9408. Correct or wrong? (a) wrong (b) correct
6. 6.18 × 8 =
7. 7.₹57.65 + ₹15.65 =
8. 8.20 × 15 =
9. 9.203 − 38 =
10. 10.₹30.65 − ₹12.30 =
11. 11.79² =
12. 12.Best estimate of 79 × 88? (a) 720 (b) 14400 (c) 72000 (d) 7200
13. 13.Check with nines: 713 + 176 = 889. Correct or wrong? (a) correct (b) wrong
14. 14.81 × 5 =
15. 15.Check with nines: 56 × 26 = 1460. Correct or wrong? (a) wrong (b) correct
16. 16.29 × 15 =
17. 17.50% of 300 =
18. 18.90 × 50 =
19. 19.141 + 29 =
20. 20.79² =
21. 21.10% of 440 =
22. 22.15 × 50 =
23. 23.62 × 15 =
24. 24.₹37.70 − ₹29.95 =
25. 25.41² =
26. 26.15 × 12 =
27. 27.₹49.85 + ₹4.35 =
28. 28.475 + 17 =
29. 29.78 + 14 + 16 + 55 =
30. 30.17 × 11 =
31. 31.42 × 50 =
32. 32.25% of 70 =
33. 33.63 + 20 + 79 + 42 =
34. 34.58 + 41 + 58 + 28 =
35. 35.15 × 12 =
36. 36.400 + 17 =
37. 37.76 + 66 + 31 + 47 =
38. 38.31 × 5 =
39. 39.Best estimate of 497 × 8? (a) 8000 (b) 400 (c) 4000 (d) 40000
40. 40.Best estimate of 29 × 61? (a) 180 (b) 3600 (c) 1800 (d) 18000

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