Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 61 · 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. 1.2 + 3 + 7 + 7 =
2. 2.₹36.05 − ₹27.70 =
3. 3.1% of 890 =
4. 4.Check with nines: 57 × 60 = 3420. Correct or wrong? (a) wrong (b) correct
5. 5.15 + 41 + 30 + 42 =
6. 6.330 − 89 =
7. 7.51 × 4 =
8. 8.450 ÷ 50 =
9. 9.705 ÷ 5 =
10. 10.14 × 16 =
11. 11.1 + 6 + 6 + 4 =
12. 12.83 × 5 =
13. 13.Check with nines: 84 × 94 = 7900. Correct or wrong? (a) wrong (b) correct
14. 14.381 + 47 =
15. 15.37 × 15 =
16. 16.1350 ÷ 50 =
17. 17.35 × 8 =
18. 18.541 − 88 =
19. 19.550 ÷ 50 =
20. 20.70 + 80 + 79 + 24 =
21. 21.56 + 33 + 33 + 33 =
22. 22.3 + 7 + 4 + 8 =
23. 23.22 × 50 =
24. 24.Check with nines: 74 × 77 = 5698. Correct or wrong? (a) wrong (b) correct
25. 25.50% of 40 =
26. 26.8 + 5 + 9 + 1 =
27. 27.Best estimate of 69 × 81? (a) 11200 (b) 56000 (c) 5600 (d) 560
28. 28.15 × 50 =
29. 29.64 × 15 =
30. 30.35 × 15 =
31. 31.11 × 15 =
32. 32.51 × 8 =
33. 33.337 + 99 =
34. 34.Best estimate of 58 × 48? (a) 3000 (b) 300 (c) 6000 (d) 30000
35. 35.Check with nines: 41 × 20 = 820. Correct or wrong? (a) wrong (b) correct
36. 36.40 + 39 + 16 + 33 =
37. 37.Best estimate of 18 × 78? (a) 1600 (b) 160 (c) 3200 (d) 16000
38. 38.13 × 14 =
39. 39.3 + 8 + 7 + 5 + 2 =
40. 40.29² =

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