Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 654 · 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. 1.21² =
2. 2.Best estimate of 31 × 58? (a) 3600 (b) 180 (c) 18000 (d) 1800
3. 3.Check with nines: 375 + 280 = 662. Correct or wrong? (a) correct (b) wrong
4. 4.20 × 15 =
5. 5.31² =
6. 6.45 × 15 =
7. 7.32 + 88 + 58 + 84 =
8. 8.18 × 11 =
9. 9.Check with nines: 355 + 363 = 718. Correct or wrong? (a) correct (b) wrong
10. 10.108 + 67 =
11. 11.125 ÷ 25 =
12. 12.₹90.85 − ₹49.30 =
13. 13.63 × 5 =
14. 14.70 + 84 + 60 + 30 =
15. 15.Best estimate of 49 × 79? (a) 4000 (b) 40000 (c) 8000 (d) 400
16. 16.440 + 17 =
17. 17.50% of 520 =
18. 18.31 × 5 =
19. 19.15% of 390 =
20. 20.₹58.40 − ₹6.25 =
21. 21.253 − 39 =
22. 22.124 + 58 =
23. 23.59 + 71 + 16 + 18 =
24. 24.Best estimate of 42 × 48? (a) 20000 (b) 4000 (c) 200 (d) 2000
25. 25.57 × 15 =
26. 26.1 + 6 + 2 + 9 =
27. 27.11 + 40 + 70 + 25 =
28. 28.17 × 13 =
29. 29.1400 ÷ 25 =
30. 30.50% of 500 =
31. 31.Check with nines: 35 × 78 = 2730. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 48 × 55 = 2639. Correct or wrong? (a) wrong (b) correct
33. 33.226 + 57 =
34. 34.60 × 15 =
35. 35.15 × 12 =
36. 36.6 + 7 + 1 + 4 =
37. 37.₹46.60 − ₹44.80 =
38. 38.50% of 680 =
39. 39.500 ÷ 50 =
40. 40.519 − 88 =

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