Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 531 · 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.Best estimate of 52 × 29? (a) 1500 (b) 15000 (c) 3000 (d) 150
2. 2.33 × 15 =
3. 3.15 × 11 =
4. 4.41 × 5 =
5. 5.₹70.40 − ₹14.25 =
6. 6.157 × 4 =
7. 7.1 + 8 + 2 + 6 + 2 =
8. 8.450 ÷ 25 =
9. 9.Best estimate of 21 × 81? (a) 1600 (b) 16000 (c) 160 (d) 3200
10. 10.49² =
11. 11.136 + 79 =
12. 12.29² =
13. 13.62 + 39 =
14. 14.Check with nines: 157 + 356 = 516. Correct or wrong? (a) wrong (b) correct
15. 15.193 + 78 =
16. 16.26 × 4 =
17. 17.53 × 50 =
18. 18.91² =
19. 19.388 − 47 =
20. 20.45 × 8 =
21. 21.12 × 16 =
22. 22.50% of 100 =
23. 23.Best estimate of 31 × 39? (a) 1200 (b) 12000 (c) 120 (d) 2400
24. 24.7 + 5 + 2 + 3 =
25. 25.800 ÷ 25 =
26. 26.159 − 97 =
27. 27.71 × 8 =
28. 28.51 × 15 =
29. 29.Check with nines: 15 × 84 = 1260. Correct or wrong? (a) correct (b) wrong
30. 30.₹48.05 + ₹21.40 =
31. 31.582 − 78 =
32. 32.Best estimate of 398 × 8? (a) 32000 (b) 320 (c) 3200 (d) 6400
33. 33.132 × 4 =
34. 34.Best estimate of 199 × 3? (a) 6000 (b) 1200 (c) 60 (d) 600
35. 35.18 × 15 =
36. 36.41² =
37. 37.₹53.90 − ₹47.25 =
38. 38.3 + 3 + 1 + 5 + 7 =
39. 39.Best estimate of 903 × 9? (a) 8100 (b) 81000 (c) 16200 (d) 810
40. 40.7 + 7 + 9 + 6 + 3 =

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