Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 427 · 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. 1.48 × 8 =
2. 2.40 + 22 + 81 + 81 =
3. 3.82 × 50 =
4. 4.4 + 8 + 3 + 7 =
5. 5.323 + 89 =
6. 6.Check with nines: 817 + 532 = 1349. Correct or wrong? (a) correct (b) wrong
7. 7.1375 ÷ 25 =
8. 8.38 + 42 + 12 + 68 =
9. 9.29 × 4 =
10. 10.41 × 4 =
11. 11.39 + 33 + 63 + 49 =
12. 12.Best estimate of 497 × 3? (a) 1500 (b) 150 (c) 3000 (d) 15000
13. 13.₹72.50 − ₹11.35 =
14. 14.50% of 630 =
15. 15.13 × 8 =
16. 16.39 × 15 =
17. 17.24 + 54 + 71 + 15 =
18. 18.293 − 18 =
19. 19.16 × 12 =
20. 20.135 + 48 =
21. 21.8 × 15 =
22. 22.37 × 15 =
23. 23.Best estimate of 79 × 82? (a) 12800 (b) 64000 (c) 6400 (d) 640
24. 24.25 × 15 =
25. 25.4 + 4 + 9 + 6 =
26. 26.62 + 48 + 58 + 86 =
27. 27.14 × 19 =
28. 28.Check with nines: 680 + 164 = 842. Correct or wrong? (a) wrong (b) correct
29. 29.46 + 99 =
30. 30.4 × 15 =
31. 31.94 × 50 =
32. 32.36 × 8 =
33. 33.593 − 47 =
34. 34.7 + 1 + 7 + 3 + 4 =
35. 35.Best estimate of 398 × 3? (a) 12000 (b) 2400 (c) 120 (d) 1200
36. 36.46 × 15 =
37. 37.Best estimate of 28 × 41? (a) 2400 (b) 12000 (c) 120 (d) 1200
38. 38.462 + 69 =
39. 39.415 ÷ 5 =
40. 40.87 × 5 =

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