Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 858 · 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 42 × 42? (a) 3200 (b) 16000 (c) 160 (d) 1600
2. 2.392 + 37 =
3. 3.89² =
4. 4.24 × 8 =
5. 5.15 × 5 =
6. 6.272 − 78 =
7. 7.1250 ÷ 50 =
8. 8.14 × 14 =
9. 9.418 + 18 =
10. 10.Best estimate of 198 × 6? (a) 2400 (b) 120 (c) 1200 (d) 12000
11. 11.Check with nines: 686 + 293 = 979. Correct or wrong? (a) wrong (b) correct
12. 12.66 × 4 =
13. 13.15 × 8 =
14. 14.84 × 5 =
15. 15.Best estimate of 97 × 6? (a) 1200 (b) 6000 (c) 600 (d) 60
16. 16.33 + 26 + 45 + 23 =
17. 17.18 + 46 + 76 + 61 =
18. 18.61 × 50 =
19. 19.175 ÷ 25 =
20. 20.₹30.15 + ₹40.85 =
21. 21.8 + 3 + 3 + 3 + 7 =
22. 22.Best estimate of 99 × 8? (a) 8000 (b) 80 (c) 1600 (d) 800
23. 23.2 + 6 + 5 + 4 + 6 =
24. 24.188 + 67 =
25. 25.20% of 90 =
26. 26.Check with nines: 956 + 413 = 1369. Correct or wrong? (a) correct (b) wrong
27. 27.190 + 48 =
28. 28.158 + 27 =
29. 29.46 × 4 =
30. 30.Best estimate of 31 × 39? (a) 12000 (b) 2400 (c) 120 (d) 1200
31. 31.95 − 59 =
32. 32.35 × 5 =
33. 33.Best estimate of 903 × 3? (a) 2700 (b) 5400 (c) 27000 (d) 270
34. 34.22 × 50 =
35. 35.67 + 28 + 77 + 23 =
36. 36.49² =
37. 37.₹59.25 − ₹13.15 =
38. 38.339 − 96 =
39. 39.₹95.20 + ₹14.05 =
40. 40.51² =

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