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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 796 · 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. 1.64 × 15 =
  2. 2.21² =
  3. 3.41² =
  4. 4.38 × 50 =
  5. 5.394 + 89 =
  6. 6.51² =
  7. 7.25 × 15 =
  8. 8.83 + 59 =
  9. 9.225 − 96 =
  10. 10.6 × 15 =
  11. 11.2 + 2 + 7 + 8 + 8 =
  12. 12.₹38.80 + ₹46.10 =
  13. 13.Best estimate of 79 × 38? (a) 320 (b) 6400 (c) 3200 (d) 32000
  14. 14.33 × 15 =
  15. 15.19 × 8 =
  16. 16.12 × 11 =
  17. 17.36 × 50 =
  18. 18.159 × 4 =
  19. 19.18 × 50 =
  20. 20.34 + 64 + 82 + 78 =
  21. 21.17 × 11 =
  22. 22.132 + 28 =
  23. 23.Best estimate of 91 × 59? (a) 5400 (b) 10800 (c) 54000 (d) 540
  24. 24.277 − 29 =
  25. 25.5 × 15 =
  26. 26.1 + 3 + 6 + 4 + 8 =
  27. 27.8 + 8 + 2 + 2 =
  28. 28.28 + 28 =
  29. 29.14 × 19 =
  30. 30.259 + 99 =
  31. 31.79² =
  32. 32.12 × 13 =
  33. 33.1% of 530 =
  34. 34.16 × 8 =
  35. 35.Best estimate of 903 × 7? (a) 630 (b) 6300 (c) 12600 (d) 63000
  36. 36.393 − 87 =
  37. 37.59 × 15 =
  38. 38.Best estimate of 397 × 9? (a) 360 (b) 7200 (c) 3600 (d) 36000
  39. 39.22 + 54 + 12 + 64 =
  40. 40.467 − 28 =

Answer key

  1. 960
  2. 441
  3. 1681
  4. 1900
  5. 483
  6. 2601
  7. 375
  8. 142
  9. 129
  10. 90
  11. 27
  12. 84.9
  13. 3200
  14. 495
  15. 152
  16. 132
  17. 1800
  18. 636
  19. 900
  20. 258
  21. 187
  22. 160
  23. 5400
  24. 248
  25. 75
  26. 22
  27. 20
  28. 56
  29. 266
  30. 358
  31. 6241
  32. 156
  33. 5.3
  34. 128
  35. 6300
  36. 306
  37. 885
  38. 3600
  39. 152
  40. 439

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