Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 50 · 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. 1.9 + 1 + 4 + 9 + 4 =
2. 2.290 − 97 =
3. 3.25% of 560 =
4. 4.18 × 50 =
5. 5.Best estimate of 58 × 32? (a) 1800 (b) 18000 (c) 180 (d) 3600
6. 6.370 − 59 =
7. 7.1% of 670 =
8. 8.Best estimate of 92 × 38? (a) 360 (b) 7200 (c) 36000 (d) 3600
9. 9.Best estimate of 899 × 9? (a) 8100 (b) 81000 (c) 16200 (d) 810
10. 10.46 + 32 + 51 + 18 =
11. 11.Best estimate of 398 × 4? (a) 160 (b) 1600 (c) 3200 (d) 16000
12. 12.37 × 5 =
13. 13.₹39.95 + ₹10.20 =
14. 14.75 × 5 =
15. 15.8 + 6 + 6 + 4 =
16. 16.571 − 56 =
17. 17.41² =
18. 18.Best estimate of 29 × 79? (a) 4800 (b) 2400 (c) 24000 (d) 240
19. 19.Best estimate of 42 × 19? (a) 800 (b) 80 (c) 8000 (d) 1600
20. 20.850 ÷ 5 =
21. 21.Check with nines: 842 + 361 = 1203. Correct or wrong? (a) wrong (b) correct
22. 22.₹81.50 + ₹26.10 =
23. 23.16 × 8 =
24. 24.51² =
25. 25.73 + 22 + 37 + 38 =
26. 26.70 × 8 =
27. 27.357 − 68 =
28. 28.17 × 18 =
29. 29.11 × 19 =
30. 30.99 × 4 =
31. 31.Check with nines: 99 × 42 = 4158. Correct or wrong? (a) wrong (b) correct
32. 32.9 + 1 + 6 + 5 =
33. 33.62 × 50 =
34. 34.61² =
35. 35.397 + 87 =
36. 36.Check with nines: 140 + 121 = 261. Correct or wrong? (a) wrong (b) correct
37. 37.318 − 89 =
38. 38.3 + 3 + 7 + 4 =
39. 39.1% of 30 =
40. 40.Best estimate of 48 × 52? (a) 5000 (b) 2500 (c) 25000 (d) 250

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