Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 84 · 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. 1.50% of 400 =
2. 2.25% of 790 =
3. 3.285 ÷ 5 =
4. 4.29 × 50 =
5. 5.Best estimate of 902 × 7? (a) 630 (b) 6300 (c) 63000 (d) 12600
6. 6.Check with nines: 359 + 471 = 830. Correct or wrong? (a) wrong (b) correct
7. 7.434 − 68 =
8. 8.235 + 17 =
9. 9.52 × 8 =
10. 10.Best estimate of 28 × 81? (a) 2400 (b) 24000 (c) 4800 (d) 240
11. 11.Best estimate of 42 × 51? (a) 200 (b) 20000 (c) 2000 (d) 4000
12. 12.16 × 15 =
13. 13.60 × 15 =
14. 14.281 + 48 =
15. 15.89 + 89 + 72 + 55 =
16. 16.18 × 19 =
17. 17.10% of 400 =
18. 18.262 + 19 =
19. 19.Best estimate of 202 × 5? (a) 2000 (b) 10000 (c) 100 (d) 1000
20. 20.59² =
21. 21.Best estimate of 701 × 7? (a) 49000 (b) 490 (c) 4900 (d) 9800
22. 22.₹59.05 + ₹39.65 =
23. 23.50% of 310 =
24. 24.46 × 5 =
25. 25.14 × 11 =
26. 26.10% of 870 =
27. 27.20 × 15 =
28. 28.₹83.80 − ₹30.60 =
29. 29.Best estimate of 101 × 6? (a) 600 (b) 60 (c) 6000 (d) 1200
30. 30.140 × 4 =
31. 31.433 + 29 =
32. 32.254 + 39 =
33. 33.8 + 8 + 8 + 2 =
34. 34.30 × 50 =
35. 35.10% of 30 =
36. 36.545 − 28 =
37. 37.Check with nines: 44 × 69 = 3044. Correct or wrong? (a) wrong (b) correct
38. 38.50% of 890 =
39. 39.60 + 51 + 58 + 89 =
40. 40.56 × 15 =

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