Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 145 · 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. 1.425 − 67 =
2. 2.Check with nines: 93 × 65 = 6052. Correct or wrong? (a) correct (b) wrong
3. 3.Best estimate of 101 × 6? (a) 60 (b) 6000 (c) 1200 (d) 600
4. 4.491 + 28 =
5. 5.₹72.45 − ₹21.80 =
6. 6.7 + 3 + 7 + 3 + 8 =
7. 7.₹88.65 + ₹33.35 =
8. 8.15% of 290 =
9. 9.46 × 8 =
10. 10.₹45.40 + ₹14.25 =
11. 11.49² =
12. 12.9 + 8 + 1 + 8 + 2 =
13. 13.13 × 4 =
14. 14.217 − 48 =
15. 15.438 + 27 =
16. 16.Best estimate of 301 × 7? (a) 4200 (b) 210 (c) 2100 (d) 21000
17. 17.11 × 12 =
18. 18.32 × 50 =
19. 19.305 − 88 =
20. 20.57 × 50 =
21. 21.102 + 58 =
22. 22.Best estimate of 31 × 61? (a) 3600 (b) 180 (c) 18000 (d) 1800
23. 23.20% of 870 =
24. 24.56 + 28 + 25 + 42 =
25. 25.17 × 15 =
26. 26.1% of 520 =
27. 27.Best estimate of 91 × 32? (a) 27000 (b) 5400 (c) 2700 (d) 270
28. 28.6 + 7 + 5 + 5 + 2 =
29. 29.₹39.05 − ₹22.10 =
30. 30.15% of 200 =
31. 31.1% of 490 =
32. 32.Best estimate of 61 × 79? (a) 48000 (b) 4800 (c) 9600 (d) 480
33. 33.Check with nines: 607 + 442 = 1051. Correct or wrong? (a) wrong (b) correct
34. 34.885 ÷ 5 =
35. 35.17 × 12 =
36. 36.163 + 27 =
37. 37.1% of 80 =
38. 38.58 × 50 =
39. 39.61² =
40. 40.127 − 86 =

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