Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 636 · 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 398 × 6? (a) 4800 (b) 240 (c) 2400 (d) 24000
2. 2.387 − 39 =
3. 3.4 + 3 + 6 + 4 + 4 =
4. 4.81² =
5. 5.124 + 28 =
6. 6.64 × 50 =
7. 7.Best estimate of 39 × 78? (a) 320 (b) 32000 (c) 6400 (d) 3200
8. 8.134 × 4 =
9. 9.65 + 83 + 48 + 17 =
10. 10.Check with nines: 308 + 790 = 1098. Correct or wrong? (a) wrong (b) correct
11. 11.5% of 640 =
12. 12.472 + 79 =
13. 13.327 − 58 =
14. 14.Best estimate of 91 × 81? (a) 7200 (b) 14400 (c) 72000 (d) 720
15. 15.128 × 4 =
16. 16.Check with nines: 229 + 559 = 788. Correct or wrong? (a) wrong (b) correct
17. 17.5% of 220 =
18. 18.1300 ÷ 25 =
19. 19.₹48.40 − ₹33.70 =
20. 20.33 × 5 =
21. 21.41² =
22. 22.Best estimate of 803 × 8? (a) 12800 (b) 640 (c) 64000 (d) 6400
23. 23.9 × 15 =
24. 24.Best estimate of 82 × 52? (a) 40000 (b) 4000 (c) 400 (d) 8000
25. 25.4 × 15 =
26. 26.496 + 79 =
27. 27.41² =
28. 28.411 − 87 =
29. 29.15% of 120 =
30. 30.20 × 15 =
31. 31.475 + 37 =
32. 32.20% of 890 =
33. 33.₹39.35 − ₹27.95 =
34. 34.11 × 11 =
35. 35.217 − 88 =
36. 36.9 + 9 + 4 + 1 + 1 =
37. 37.7 + 5 + 2 + 2 + 8 =
38. 38.25 × 8 =
39. 39.382 − 58 =
40. 40.8 + 1 + 6 + 2 =

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