Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 482 · 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. 1.46 × 5 =
2. 2.31² =
3. 3.11 × 17 =
4. 4.₹46.45 + ₹18.05 =
5. 5.Best estimate of 701 × 3? (a) 4200 (b) 210 (c) 2100 (d) 21000
6. 6.₹21.05 + ₹43.10 =
7. 7.78 + 64 + 62 + 17 =
8. 8.118 × 4 =
9. 9.1850 ÷ 50 =
10. 10.15% of 500 =
11. 11.68 − 48 =
12. 12.540 − 37 =
13. 13.29² =
14. 14.175 − 97 =
15. 15.89² =
16. 16.89² =
17. 17.366 + 67 =
18. 18.19 × 18 =
19. 19.478 − 46 =
20. 20.21² =
21. 21.47 × 8 =
22. 22.65 × 8 =
23. 23.Check with nines: 304 + 452 = 760. Correct or wrong? (a) wrong (b) correct
24. 24.132 − 49 =
25. 25.₹37.75 + ₹7.95 =
26. 26.Best estimate of 31 × 38? (a) 120 (b) 1200 (c) 12000 (d) 2400
27. 27.21² =
28. 28.21 × 4 =
29. 29.72 − 38 =
30. 30.12 × 18 =
31. 31.19 × 15 =
32. 32.Best estimate of 298 × 9? (a) 27000 (b) 2700 (c) 270 (d) 5400
33. 33.525 ÷ 25 =
34. 34.Best estimate of 21 × 68? (a) 1400 (b) 14000 (c) 2800 (d) 140
35. 35.Best estimate of 51 × 79? (a) 8000 (b) 4000 (c) 400 (d) 40000
36. 36.59 × 15 =
37. 37.275 − 58 =
38. 38.Check with nines: 730 + 209 = 939. Correct or wrong? (a) correct (b) wrong
39. 39.21² =
40. 40.5 + 2 + 8 + 9 + 3 =

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