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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 115 · 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. 1.5 × 15 =
  2. 2.19 × 4 =
  3. 3.501 − 49 =
  4. 4.11 × 15 =
  5. 5.96 − 49 =
  6. 6.38 × 5 =
  7. 7.₹81.30 + ₹7.20 =
  8. 8.380 − 27 =
  9. 9.Best estimate of 61 × 61? (a) 36000 (b) 7200 (c) 360 (d) 3600
  10. 10.15 × 18 =
  11. 11.99 × 4 =
  12. 12.5 + 7 + 3 + 4 + 7 =
  13. 13.7 + 4 + 6 + 7 + 7 =
  14. 14.120 ÷ 5 =
  15. 15.94 × 4 =
  16. 16.115 × 4 =
  17. 17.16 × 17 =
  18. 18.56 × 15 =
  19. 19.25% of 550 =
  20. 20.4 × 15 =
  21. 21.Best estimate of 901 × 3? (a) 2700 (b) 27000 (c) 5400 (d) 270
  22. 22.51² =
  23. 23.2000 ÷ 50 =
  24. 24.62 × 5 =
  25. 25.1% of 120 =
  26. 26.50 × 5 =
  27. 27.31² =
  28. 28.17 × 13 =
  29. 29.471 + 38 =
  30. 30.44 + 69 + 72 + 19 =
  31. 31.27 + 18 + 82 + 28 =
  32. 32.66 + 34 + 89 + 28 =
  33. 33.16 + 78 + 51 + 43 =
  34. 34.252 + 77 =
  35. 35.69² =
  36. 36.536 − 86 =
  37. 37.395 − 39 =
  38. 38.141 + 28 =
  39. 39.84 + 61 + 65 + 52 =
  40. 40.22 + 73 + 64 + 72 =

Answer key

  1. 75
  2. 76
  3. 452
  4. 165
  5. 47
  6. 190
  7. 88.5
  8. 353
  9. 3600
  10. 270
  11. 396
  12. 26
  13. 31
  14. 24
  15. 376
  16. 460
  17. 272
  18. 840
  19. 137.5
  20. 60
  21. 2700
  22. 2601
  23. 40
  24. 310
  25. 1.2
  26. 250
  27. 961
  28. 221
  29. 509
  30. 204
  31. 155
  32. 217
  33. 188
  34. 329
  35. 4761
  36. 450
  37. 356
  38. 169
  39. 262
  40. 231

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