Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 193 · 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. 1.506 − 28 =
2. 2.15 × 18 =
3. 3.10 × 15 =
4. 4.19 + 50 + 50 + 18 =
5. 5.250 ÷ 25 =
6. 6.₹87.05 − ₹35.35 =
7. 7.285 − 27 =
8. 8.56 + 38 =
9. 9.2 + 7 + 9 + 1 =
10. 10.60 × 4 =
11. 11.6 + 1 + 1 + 9 + 4 =
12. 12.Best estimate of 49 × 32? (a) 3000 (b) 150 (c) 15000 (d) 1500
13. 13.379 − 99 =
14. 14.9 + 7 + 3 + 9 =
15. 15.89² =
16. 16.Check with nines: 32 × 30 = 958. Correct or wrong? (a) correct (b) wrong
17. 17.1% of 350 =
18. 18.5% of 640 =
19. 19.Best estimate of 38 × 51? (a) 2000 (b) 200 (c) 4000 (d) 20000
20. 20.1% of 500 =
21. 21.39² =
22. 22.420 − 89 =
23. 23.30 + 39 =
24. 24.49² =
25. 25.8 × 15 =
26. 26.20% of 380 =
27. 27.39 × 5 =
28. 28.83 + 75 + 86 + 47 =
29. 29.61² =
30. 30.Best estimate of 203 × 4? (a) 1600 (b) 8000 (c) 800 (d) 80
31. 31.114 × 4 =
32. 32.Check with nines: 95 × 75 = 7123. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 16 × 75 = 1200. Correct or wrong? (a) wrong (b) correct
34. 34.91² =
35. 35.1% of 760 =
36. 36.15 × 19 =
37. 37.80 × 50 =
38. 38.Best estimate of 501 × 8? (a) 400 (b) 40000 (c) 8000 (d) 4000
39. 39.1375 ÷ 25 =
40. 40.68 + 67 =

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