Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 129 · 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. 1.4 + 1 + 2 + 6 =
2. 2.48 × 5 =
3. 3.370 − 97 =
4. 4.82 × 50 =
5. 5.99 + 38 =
6. 6.Best estimate of 297 × 9? (a) 270 (b) 2700 (c) 5400 (d) 27000
7. 7.147 × 4 =
8. 8.Best estimate of 79 × 68? (a) 560 (b) 11200 (c) 56000 (d) 5600
9. 9.₹36.85 − ₹8.45 =
10. 10.31 × 4 =
11. 11.1 + 2 + 2 + 8 + 8 =
12. 12.343 + 47 =
13. 13.3 + 3 + 7 + 9 =
14. 14.1 + 9 + 4 + 2 + 4 =
15. 15.89² =
16. 16.13 × 15 =
17. 17.87 × 50 =
18. 18.1 + 5 + 1 + 5 =
19. 19.₹37.70 − ₹29.70 =
20. 20.Best estimate of 297 × 5? (a) 3000 (b) 15000 (c) 1500 (d) 150
21. 21.88 − 37 =
22. 22.357 + 89 =
23. 23.25 + 13 + 18 + 77 =
24. 24.3 + 8 + 2 + 3 + 6 =
25. 25.Check with nines: 73 × 93 = 6789. Correct or wrong? (a) wrong (b) correct
26. 26.12 × 19 =
27. 27.₹18.65 − ₹5.50 =
28. 28.8 + 2 + 7 + 1 + 2 =
29. 29.189 − 89 =
30. 30.8 + 6 + 6 + 9 + 4 =
31. 31.1% of 850 =
32. 32.5 × 15 =
33. 33.Check with nines: 54 × 25 = 1352. Correct or wrong? (a) wrong (b) correct
34. 34.25% of 380 =
35. 35.25% of 440 =
36. 36.81 + 27 =
37. 37.71² =
38. 38.350 ÷ 25 =
39. 39.458 + 47 =
40. 40.35 + 75 + 20 + 66 =

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