Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 641 · 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. 1.31 + 29 + 28 + 86 =
2. 2.24 × 8 =
3. 3.32 × 15 =
4. 4.20% of 110 =
5. 5.Check with nines: 18 × 29 = 522. Correct or wrong? (a) wrong (b) correct
6. 6.71² =
7. 7.₹11.25 − ₹4.45 =
8. 8.Best estimate of 82 × 18? (a) 160 (b) 1600 (c) 16000 (d) 3200
9. 9.4 + 3 + 9 + 6 =
10. 10.55 + 89 =
11. 11.39 × 15 =
12. 12.61 + 16 + 53 + 43 =
13. 13.15 + 21 + 59 + 47 =
14. 14.31 × 5 =
15. 15.64 × 8 =
16. 16.Check with nines: 21 × 20 = 420. Correct or wrong? (a) wrong (b) correct
17. 17.5 + 5 + 1 + 6 =
18. 18.67 × 8 =
19. 19.384 − 47 =
20. 20.145 − 47 =
21. 21.₹55.65 − ₹26.40 =
22. 22.13 + 68 + 31 + 37 =
23. 23.₹21.20 + ₹17.60 =
24. 24.1000 ÷ 25 =
25. 25.₹36.55 − ₹29.10 =
26. 26.63 × 15 =
27. 27.81 − 77 =
28. 28.Check with nines: 23 × 80 = 1840. Correct or wrong? (a) correct (b) wrong
29. 29.₹23.70 + ₹9.15 =
30. 30.341 − 56 =
31. 31.50% of 270 =
32. 32.51 × 5 =
33. 33.29 × 8 =
34. 34.Check with nines: 18 × 82 = 1476. Correct or wrong? (a) correct (b) wrong
35. 35.Best estimate of 499 × 9? (a) 450 (b) 4500 (c) 45000 (d) 9000
36. 36.₹6.30 + ₹49.40 =
37. 37.11 + 72 + 85 + 18 =
38. 38.Best estimate of 62 × 18? (a) 1200 (b) 2400 (c) 120 (d) 12000
39. 39.311 − 69 =
40. 40.362 − 59 =

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