Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 871 · 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.₹41.70 − ₹25.10 =
2. 2.Check with nines: 50 × 84 = 4200. Correct or wrong? (a) correct (b) wrong
3. 3.₹93.90 + ₹4.35 =
4. 4.25 × 8 =
5. 5.91² =
6. 6.122 + 57 =
7. 7.Check with nines: 48 × 36 = 1728. Correct or wrong? (a) correct (b) wrong
8. 8.138 − 66 =
9. 9.39 + 53 + 59 + 26 =
10. 10.103 × 4 =
11. 11.17 + 78 + 38 + 20 =
12. 12.88 + 57 + 74 + 59 =
13. 13.41² =
14. 14.₹14.45 + ₹17.40 =
15. 15.Best estimate of 99 × 9? (a) 1800 (b) 9000 (c) 90 (d) 900
16. 16.75 × 8 =
17. 17.147 × 4 =
18. 18.Best estimate of 102 × 3? (a) 3000 (b) 30 (c) 600 (d) 300
19. 19.280 − 79 =
20. 20.37 × 15 =
21. 21.Check with nines: 95 × 48 = 4566. Correct or wrong? (a) wrong (b) correct
22. 22.₹66.45 + ₹49.45 =
23. 23.31² =
24. 24.33 × 15 =
25. 25.29² =
26. 26.₹35.35 − ₹34.25 =
27. 27.845 ÷ 5 =
28. 28.Check with nines: 97 × 16 = 1552. Correct or wrong? (a) correct (b) wrong
29. 29.8 + 8 + 7 + 2 =
30. 30.14 × 11 =
31. 31.24 × 4 =
32. 32.Best estimate of 88 × 59? (a) 10800 (b) 54000 (c) 5400 (d) 540
33. 33.1450 ÷ 50 =
34. 34.190 + 28 =
35. 35.54 − 46 =
36. 36.15 × 11 =
37. 37.136 + 38 =
38. 38.Best estimate of 702 × 8? (a) 56000 (b) 560 (c) 11200 (d) 5600
39. 39.₹26.75 + ₹21.75 =
40. 40.1400 ÷ 50 =

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