Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 309 · 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. 1.61² =
2. 2.Best estimate of 88 × 72? (a) 630 (b) 12600 (c) 6300 (d) 63000
3. 3.204 + 97 =
4. 4.39² =
5. 5.5% of 110 =
6. 6.77 × 4 =
7. 7.442 + 79 =
8. 8.Check with nines: 30 × 97 = 2910. Correct or wrong? (a) wrong (b) correct
9. 9.81² =
10. 10.11 × 17 =
11. 11.₹26.10 − ₹24.85 =
12. 12.Check with nines: 137 + 675 = 812. Correct or wrong? (a) wrong (b) correct
13. 13.6 × 15 =
14. 14.Check with nines: 284 + 459 = 744. Correct or wrong? (a) correct (b) wrong
15. 15.300 ÷ 5 =
16. 16.19² =
17. 17.13 × 11 =
18. 18.59² =
19. 19.Best estimate of 597 × 6? (a) 360 (b) 3600 (c) 36000 (d) 7200
20. 20.344 + 99 =
21. 21.225 + 17 =
22. 22.8 + 5 + 1 + 5 =
23. 23.Best estimate of 49 × 38? (a) 20000 (b) 4000 (c) 200 (d) 2000
24. 24.450 ÷ 5 =
25. 25.6 + 9 + 2 + 4 =
26. 26.Best estimate of 78 × 71? (a) 11200 (b) 56000 (c) 560 (d) 5600
27. 27.29 + 68 + 28 + 86 =
28. 28.14 × 11 =
29. 29.9 + 3 + 4 + 6 =
30. 30.4 + 1 + 7 + 3 =
31. 31.15% of 90 =
32. 32.54 + 40 + 69 + 13 =
33. 33.₹38.60 − ₹17.30 =
34. 34.₹7.60 + ₹14.10 =
35. 35.1200 ÷ 50 =
36. 36.Best estimate of 197 × 9? (a) 18000 (b) 180 (c) 1800 (d) 3600
37. 37.136 + 87 =
38. 38.16 × 15 =
39. 39.Check with nines: 245 + 814 = 1059. Correct or wrong? (a) wrong (b) correct
40. 40.46 + 46 + 56 + 43 =

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