Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 19 · 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. 1.567 − 76 =
2. 2.91² =
3. 3.Check with nines: 408 + 491 = 906. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 442 + 894 = 1331. Correct or wrong? (a) correct (b) wrong
5. 5.351 + 87 =
6. 6.Best estimate of 102 × 4? (a) 4000 (b) 40 (c) 400 (d) 800
7. 7.140 × 4 =
8. 8.12 × 13 =
9. 9.20% of 100 =
10. 10.49² =
11. 11.20% of 380 =
12. 12.39 + 25 + 34 + 26 =
13. 13.Check with nines: 696 + 604 = 1300. Correct or wrong? (a) correct (b) wrong
14. 14.81² =
15. 15.67 + 16 + 34 + 16 =
16. 16.164 + 28 =
17. 17.18 + 72 + 16 + 76 =
18. 18.970 ÷ 5 =
19. 19.₹78.90 + ₹33.05 =
20. 20.15 × 50 =
21. 21.₹59.90 + ₹5.65 =
22. 22.378 − 37 =
23. 23.265 + 78 =
24. 24.₹57.50 + ₹22.25 =
25. 25.63 × 15 =
26. 26.₹37.25 − ₹17.95 =
27. 27.Best estimate of 28 × 19? (a) 6000 (b) 60 (c) 600 (d) 1200
28. 28.3 + 7 + 7 + 2 =
29. 29.89 + 32 + 19 + 88 =
30. 30.79 × 5 =
31. 31.Best estimate of 78 × 81? (a) 64000 (b) 640 (c) 6400 (d) 12800
32. 32.428 + 28 =
33. 33.259 + 39 =
34. 34.20% of 570 =
35. 35.₹25.40 + ₹7.65 =
36. 36.25% of 140 =
37. 37.41² =
38. 38.53 × 4 =
39. 39.₹61.90 + ₹8.05 =
40. 40.81² =

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