Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 945 · 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. 1.86 × 4 =
2. 2.Best estimate of 82 × 18? (a) 1600 (b) 160 (c) 3200 (d) 16000
3. 3.₹62.65 − ₹14.65 =
4. 4.91² =
5. 5.29² =
6. 6.107 + 18 =
7. 7.50% of 610 =
8. 8.Check with nines: 159 + 242 = 401. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 235 + 587 = 814. Correct or wrong? (a) wrong (b) correct
10. 10.6 + 8 + 6 + 1 + 2 =
11. 11.10% of 610 =
12. 12.50% of 750 =
13. 13.5% of 380 =
14. 14.128 × 4 =
15. 15.59 + 54 + 46 + 13 =
16. 16.218 + 88 =
17. 17.54 × 50 =
18. 18.104 − 99 =
19. 19.7 + 2 + 4 + 9 + 1 =
20. 20.410 + 38 =
21. 21.5% of 340 =
22. 22.5 + 2 + 8 + 7 =
23. 23.1 + 9 + 6 + 1 =
24. 24.5% of 710 =
25. 25.Check with nines: 20 × 31 = 620. Correct or wrong? (a) wrong (b) correct
26. 26.Best estimate of 401 × 8? (a) 32000 (b) 320 (c) 3200 (d) 6400
27. 27.12 × 19 =
28. 28.115 × 4 =
29. 29.Best estimate of 603 × 3? (a) 3600 (b) 1800 (c) 180 (d) 18000
30. 30.81² =
31. 31.135 + 68 =
32. 32.₹80.15 − ₹15.85 =
33. 33.511 − 96 =
34. 34.50% of 90 =
35. 35.9 × 15 =
36. 36.14 × 50 =
37. 37.₹37.50 − ₹18.15 =
38. 38.39 × 15 =
39. 39.29² =
40. 40.81² =

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