Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 336 · 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. 1.79² =
2. 2.Check with nines: 536 + 138 = 674. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 97 × 29 = 2813. Correct or wrong? (a) correct (b) wrong
4. 4.22 × 8 =
5. 5.25 × 8 =
6. 6.₹39.85 + ₹36.40 =
7. 7.8 + 2 + 7 + 3 =
8. 8.25 + 17 + 34 + 42 =
9. 9.31² =
10. 10.8 + 2 + 8 + 5 + 8 =
11. 11.205 ÷ 5 =
12. 12.5% of 840 =
13. 13.Best estimate of 101 × 8? (a) 800 (b) 8000 (c) 80 (d) 1600
14. 14.₹98.30 − ₹4.75 =
15. 15.₹56.15 + ₹16.15 =
16. 16.1250 ÷ 50 =
17. 17.13 × 15 =
18. 18.Best estimate of 68 × 21? (a) 2800 (b) 140 (c) 1400 (d) 14000
19. 19.48 + 17 + 70 + 24 =
20. 20.Best estimate of 298 × 3? (a) 9000 (b) 900 (c) 90 (d) 1800
21. 21.60 × 15 =
22. 22.338 + 47 =
23. 23.33 × 5 =
24. 24.2 + 3 + 8 + 6 =
25. 25.31 × 15 =
26. 26.16 + 37 + 52 + 62 =
27. 27.221 + 38 =
28. 28.25% of 330 =
29. 29.484 − 67 =
30. 30.235 ÷ 5 =
31. 31.59² =
32. 32.24 × 15 =
33. 33.16 × 14 =
34. 34.22 + 47 + 56 + 87 =
35. 35.10% of 410 =
36. 36.38 + 28 =
37. 37.Check with nines: 42 × 71 = 2982. Correct or wrong? (a) wrong (b) correct
38. 38.51² =
39. 39.55 × 15 =
40. 40.Best estimate of 61 × 92? (a) 540 (b) 54000 (c) 5400 (d) 10800

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