Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 291 · 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. 2.17 × 15 =
3. 3.21² =
4. 4.3 + 7 + 4 + 5 =
5. 5.12 × 16 =
6. 6.9 + 8 + 1 + 2 =
7. 7.Check with nines: 50 × 83 = 4150. Correct or wrong? (a) correct (b) wrong
8. 8.158 − 86 =
9. 9.78 × 5 =
10. 10.₹52.30 + ₹39.10 =
11. 11.Best estimate of 798 × 4? (a) 32000 (b) 6400 (c) 3200 (d) 320
12. 12.41 × 15 =
13. 13.508 − 77 =
14. 14.₹32.20 − ₹5.15 =
15. 15.₹37.05 − ₹27.85 =
16. 16.41 × 8 =
17. 17.64 × 15 =
18. 18.36 × 4 =
19. 19.79 × 5 =
20. 20.Best estimate of 32 × 58? (a) 18000 (b) 3600 (c) 180 (d) 1800
21. 21.48 × 4 =
22. 22.50% of 480 =
23. 23.19 + 26 + 21 + 66 =
24. 24.79 + 74 + 20 + 69 =
25. 25.Check with nines: 33 × 78 = 2574. Correct or wrong? (a) wrong (b) correct
26. 26.Best estimate of 39 × 29? (a) 12000 (b) 2400 (c) 120 (d) 1200
27. 27.23 × 15 =
28. 28.67 + 86 + 82 + 57 =
29. 29.484 − 68 =
30. 30.7 + 2 + 4 + 8 =
31. 31.₹73.30 − ₹18.75 =
32. 32.230 − 67 =
33. 33.109 − 78 =
34. 34.1 + 2 + 8 + 8 =
35. 35.77 + 29 + 33 + 52 =
36. 36.14 + 58 + 12 + 70 =
37. 37.52 × 15 =
38. 38.209 − 28 =
39. 39.6 + 4 + 2 + 8 + 6 =
40. 40.₹99.25 + ₹14.35 =

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