Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 870 · 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.Best estimate of 698 × 3? (a) 4200 (b) 21000 (c) 2100 (d) 210
2. 2.41² =
3. 3.Best estimate of 78 × 81? (a) 64000 (b) 12800 (c) 6400 (d) 640
4. 4.91² =
5. 5.₹13.25 + ₹33.50 =
6. 6.Check with nines: 571 + 470 = 1041. Correct or wrong? (a) wrong (b) correct
7. 7.₹54.15 − ₹3.50 =
8. 8.41² =
9. 9.40 + 17 + 71 + 83 =
10. 10.291 + 67 =
11. 11.Check with nines: 74 × 12 = 881. Correct or wrong? (a) wrong (b) correct
12. 12.519 − 59 =
13. 13.61² =
14. 14.58 × 15 =
15. 15.8 × 15 =
16. 16.Check with nines: 48 × 17 = 816. Correct or wrong? (a) wrong (b) correct
17. 17.81² =
18. 18.23 × 8 =
19. 19.39² =
20. 20.Best estimate of 79 × 71? (a) 11200 (b) 56000 (c) 5600 (d) 560
21. 21.13 × 12 =
22. 22.241 + 39 =
23. 23.14 × 13 =
24. 24.19 × 15 =
25. 25.₹11.30 + ₹33.65 =
26. 26.Check with nines: 86 × 22 = 1894. Correct or wrong? (a) wrong (b) correct
27. 27.46 + 80 + 73 + 41 =
28. 28.24 × 50 =
29. 29.Best estimate of 401 × 6? (a) 240 (b) 4800 (c) 2400 (d) 24000
30. 30.1250 ÷ 50 =
31. 31.61² =
32. 32.205 + 27 =
33. 33.17 × 11 =
34. 34.₹68.05 − ₹30.60 =
35. 35.6 + 3 + 8 + 7 + 3 =
36. 36.50 + 31 + 34 + 53 =
37. 37.394 − 77 =
38. 38.Check with nines: 875 + 291 = 1166. Correct or wrong? (a) correct (b) wrong
39. 39.411 − 69 =
40. 40.31² =

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