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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 352 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.Best estimate of 101 × 8? (a) 8000 (b) 800 (c) 80 (d) 1600
  2. 2.511 − 46 =
  3. 3.21 × 50 =
  4. 4.25% of 850 =
  5. 5.222 + 89 =
  6. 6.29² =
  7. 7.33 × 15 =
  8. 8.33 × 8 =
  9. 9.24 × 5 =
  10. 10.67 × 8 =
  11. 11.1425 ÷ 25 =
  12. 12.57 + 36 + 34 + 40 =
  13. 13.1% of 700 =
  14. 14.39 × 15 =
  15. 15.70 + 86 + 15 + 37 =
  16. 16.447 + 78 =
  17. 17.23 + 87 + 72 + 69 =
  18. 18.₹24.35 + ₹42.35 =
  19. 19.231 + 89 =
  20. 20.41² =
  21. 21.15% of 750 =
  22. 22.17 × 17 =
  23. 23.1150 ÷ 50 =
  24. 24.₹32.85 − ₹28.20 =
  25. 25.150 ÷ 50 =
  26. 26.42 × 8 =
  27. 27.9 + 7 + 7 + 8 + 2 =
  28. 28.Best estimate of 48 × 39? (a) 200 (b) 2000 (c) 4000 (d) 20000
  29. 29.₹38.05 + ₹30.95 =
  30. 30.31² =
  31. 31.49² =
  32. 32.4 + 3 + 4 + 7 =
  33. 33.57 × 5 =
  34. 34.2 + 5 + 4 + 5 =
  35. 35.3 + 8 + 2 + 4 + 9 =
  36. 36.6 + 3 + 4 + 8 =
  37. 37.5% of 530 =
  38. 38.39² =
  39. 39.Check with nines: 34 × 46 = 1556. Correct or wrong? (a) wrong (b) correct
  40. 40.Best estimate of 799 × 4? (a) 3200 (b) 6400 (c) 32000 (d) 320

Answer key

  1. 800
  2. 465
  3. 1050
  4. 212.5
  5. 311
  6. 841
  7. 495
  8. 264
  9. 120
  10. 536
  11. 57
  12. 167
  13. 7
  14. 585
  15. 208
  16. 525
  17. 251
  18. 66.7
  19. 320
  20. 1681
  21. 112.5
  22. 289
  23. 23
  24. 4.65
  25. 3
  26. 336
  27. 33
  28. 2000
  29. 69
  30. 961
  31. 2401
  32. 18
  33. 285
  34. 16
  35. 26
  36. 21
  37. 26.5
  38. 1521
  39. wrong
  40. 3200

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