Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 844 · 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 81 × 51? (a) 40000 (b) 4000 (c) 8000 (d) 400
2. 2.17 × 11 =
3. 3.34 × 15 =
4. 4.19 × 15 =
5. 5.400 ÷ 50 =
6. 6.14 × 17 =
7. 7.405 − 78 =
8. 8.69² =
9. 9.23 + 54 + 74 + 38 =
10. 10.13 × 17 =
11. 11.1 + 7 + 1 + 9 + 1 =
12. 12.48 + 32 + 55 + 37 =
13. 13.384 + 48 =
14. 14.Best estimate of 29 × 52? (a) 150 (b) 3000 (c) 15000 (d) 1500
15. 15.21² =
16. 16.29² =
17. 17.456 + 28 =
18. 18.26 × 15 =
19. 19.₹94.70 + ₹17.25 =
20. 20.15 × 13 =
21. 21.469 + 17 =
22. 22.Check with nines: 48 × 84 = 4024. Correct or wrong? (a) correct (b) wrong
23. 23.51 × 4 =
24. 24.292 + 88 =
25. 25.52 × 15 =
26. 26.53 + 21 + 64 + 68 =
27. 27.Best estimate of 39 × 18? (a) 800 (b) 1600 (c) 80 (d) 8000
28. 28.114 × 4 =
29. 29.83 + 75 + 26 + 53 =
30. 30.49² =
31. 31.415 ÷ 5 =
32. 32.6 + 1 + 1 + 4 =
33. 33.3 + 5 + 7 + 3 =
34. 34.18 × 19 =
35. 35.15 + 35 + 38 + 51 =
36. 36.8 + 3 + 4 + 6 =
37. 37.Check with nines: 71 × 54 = 3828. Correct or wrong? (a) wrong (b) correct
38. 38.61² =
39. 39.201 − 77 =
40. 40.Best estimate of 497 × 9? (a) 9000 (b) 450 (c) 45000 (d) 4500

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths