Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 126 · 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. 1.12 × 17 =
2. 2.8 + 4 + 2 + 6 + 5 =
3. 3.Best estimate of 92 × 92? (a) 810 (b) 16200 (c) 81000 (d) 8100
4. 4.Best estimate of 897 × 9? (a) 8100 (b) 810 (c) 16200 (d) 81000
5. 5.₹41.90 − ₹21.40 =
6. 6.5 × 15 =
7. 7.₹28.40 − ₹20.65 =
8. 8.₹27.35 + ₹19.40 =
9. 9.Best estimate of 79 × 72? (a) 5600 (b) 560 (c) 11200 (d) 56000
10. 10.47 + 64 + 61 + 19 =
11. 11.34 × 50 =
12. 12.26 × 4 =
13. 13.21² =
14. 14.245 + 19 =
15. 15.39 × 8 =
16. 16.9 + 7 + 7 + 1 =
17. 17.59 × 5 =
18. 18.108 × 4 =
19. 19.114 − 49 =
20. 20.62 × 4 =
21. 21.Best estimate of 401 × 3? (a) 12000 (b) 120 (c) 2400 (d) 1200
22. 22.89² =
23. 23.55 × 50 =
24. 24.162 − 76 =
25. 25.1% of 560 =
26. 26.750 ÷ 50 =
27. 27.2 + 5 + 9 + 2 + 5 =
28. 28.₹91.95 + ₹21.10 =
29. 29.41 + 76 + 36 + 77 =
30. 30.38 + 40 + 46 + 21 =
31. 31.15% of 280 =
32. 32.194 − 76 =
33. 33.3 + 8 + 2 + 6 + 1 =
34. 34.8 + 5 + 7 + 2 + 1 =
35. 35.534 − 79 =
36. 36.12 × 19 =
37. 37.69² =
38. 38.71² =
39. 39.₹20.50 + ₹45.95 =
40. 40.Check with nines: 51 × 35 = 1785. Correct or wrong? (a) correct (b) wrong

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