Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 297 · 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. 1.39² =
2. 2.69 × 50 =
3. 3.10% of 150 =
4. 4.71² =
5. 5.12 × 19 =
6. 6.45 × 4 =
7. 7.Check with nines: 91 × 70 = 6370. Correct or wrong? (a) wrong (b) correct
8. 8.49² =
9. 9.Check with nines: 48 × 88 = 4224. Correct or wrong? (a) wrong (b) correct
10. 10.433 + 59 =
11. 11.₹63.15 − ₹5.05 =
12. 12.Check with nines: 909 + 960 = 1869. Correct or wrong? (a) correct (b) wrong
13. 13.133 + 87 =
14. 14.8 + 4 + 6 + 1 + 4 =
15. 15.31 × 4 =
16. 16.59² =
17. 17.41² =
18. 18.9 + 6 + 1 + 4 =
19. 19.7 + 3 + 3 + 1 =
20. 20.55 + 47 =
21. 21.7 + 9 + 3 + 3 + 7 =
22. 22.70 ÷ 5 =
23. 23.20 × 8 =
24. 24.3 + 6 + 1 + 9 + 9 =
25. 25.73 × 8 =
26. 26.152 − 89 =
27. 27.77 + 47 =
28. 28.10 × 15 =
29. 29.9 + 5 + 1 + 1 =
30. 30.Check with nines: 71 × 90 = 6390. Correct or wrong? (a) wrong (b) correct
31. 31.497 − 77 =
32. 32.3 + 1 + 4 + 9 =
33. 33.68 + 50 + 30 + 83 =
34. 34.Best estimate of 102 × 9? (a) 900 (b) 90 (c) 1800 (d) 9000
35. 35.47 × 50 =
36. 36.38 × 4 =
37. 37.89 − 18 =
38. 38.18 × 5 =
39. 39.48 × 4 =
40. 40.9 + 3 + 7 + 5 + 7 =

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