Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 863 · 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.₹94.60 + ₹31.55 =
2. 2.Check with nines: 54 × 65 = 3508. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 60 × 53 = 3180. Correct or wrong? (a) wrong (b) correct
4. 4.Best estimate of 52 × 79? (a) 400 (b) 40000 (c) 8000 (d) 4000
5. 5.311 + 99 =
6. 6.57 × 15 =
7. 7.Best estimate of 62 × 48? (a) 30000 (b) 300 (c) 6000 (d) 3000
8. 8.79² =
9. 9.71² =
10. 10.49² =
11. 11.Best estimate of 18 × 68? (a) 140 (b) 14000 (c) 1400 (d) 2800
12. 12.197 − 26 =
13. 13.78 + 81 + 18 + 25 =
14. 14.9 + 7 + 1 + 9 + 1 =
15. 15.153 × 4 =
16. 16.24 × 8 =
17. 17.Best estimate of 903 × 7? (a) 63000 (b) 6300 (c) 630 (d) 12600
18. 18.Best estimate of 21 × 72? (a) 140 (b) 14000 (c) 2800 (d) 1400
19. 19.324 − 37 =
20. 20.₹24.20 − ₹23.45 =
21. 21.51² =
22. 22.₹74.15 − ₹41.85 =
23. 23.Best estimate of 62 × 68? (a) 8400 (b) 420 (c) 4200 (d) 42000
24. 24.₹79.45 − ₹41.20 =
25. 25.44 × 5 =
26. 26.38 × 15 =
27. 27.70 × 8 =
28. 28.1 + 9 + 6 + 4 + 1 =
29. 29.₹65.10 + ₹37.35 =
30. 30.1 + 2 + 1 + 5 + 5 =
31. 31.₹39.80 + ₹24.35 =
32. 32.235 ÷ 5 =
33. 33.129 × 4 =
34. 34.23 × 15 =
35. 35.20 × 8 =
36. 36.Best estimate of 28 × 59? (a) 18000 (b) 3600 (c) 180 (d) 1800
37. 37.31 × 5 =
38. 38.495 ÷ 5 =
39. 39.50% of 200 =
40. 40.1250 ÷ 50 =

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