Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 917 · 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. 1.83 × 4 =
2. 2.Best estimate of 803 × 4? (a) 6400 (b) 320 (c) 32000 (d) 3200
3. 3.Best estimate of 51 × 71? (a) 3500 (b) 7000 (c) 350 (d) 35000
4. 4.Best estimate of 897 × 4? (a) 360 (b) 7200 (c) 36000 (d) 3600
5. 5.400 ÷ 50 =
6. 6.2 + 8 + 6 + 8 + 1 =
7. 7.155 × 4 =
8. 8.52 × 15 =
9. 9.202 + 79 =
10. 10.37 × 50 =
11. 11.549 − 39 =
12. 12.Best estimate of 18 × 41? (a) 80 (b) 8000 (c) 1600 (d) 800
13. 13.43 × 5 =
14. 14.18 × 8 =
15. 15.130 + 19 =
16. 16.470 + 28 =
17. 17.Best estimate of 82 × 42? (a) 32000 (b) 320 (c) 3200 (d) 6400
18. 18.Best estimate of 39 × 59? (a) 24000 (b) 240 (c) 2400 (d) 4800
19. 19.82 × 50 =
20. 20.132 + 69 =
21. 21.62 × 15 =
22. 22.1650 ÷ 50 =
23. 23.401 − 59 =
24. 24.56 + 67 =
25. 25.1 + 1 + 5 + 9 + 7 =
26. 26.79² =
27. 27.444 + 69 =
28. 28.103 × 4 =
29. 29.Best estimate of 31 × 88? (a) 27000 (b) 270 (c) 5400 (d) 2700
30. 30.10% of 30 =
31. 31.Best estimate of 32 × 72? (a) 4200 (b) 2100 (c) 210 (d) 21000
32. 32.3 + 5 + 7 + 7 =
33. 33.3 + 4 + 6 + 5 + 7 =
34. 34.5 + 2 + 5 + 5 + 2 =
35. 35.6 + 9 + 1 + 3 + 8 =
36. 36.48 + 97 =
37. 37.Best estimate of 299 × 9? (a) 27000 (b) 5400 (c) 270 (d) 2700
38. 38.520 − 18 =
39. 39.₹79.55 + ₹9.85 =
40. 40.Best estimate of 601 × 4? (a) 240 (b) 24000 (c) 2400 (d) 4800

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