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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 739 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.13 × 4 =
  2. 2.34 × 8 =
  3. 3.49 × 8 =
  4. 4.41 × 4 =
  5. 5.13 × 8 =
  6. 6.64 × 8 =
  7. 7.72 × 8 =
  8. 8.122 × 4 =
  9. 9.27 × 8 =
  10. 10.99 × 4 =
  11. 11.71 × 8 =
  12. 12.59 × 8 =
  13. 13.33 × 4 =
  14. 14.69 × 4 =
  15. 15.15 × 8 =
  16. 16.30 × 4 =
  17. 17.81 × 4 =
  18. 18.24 × 4 =
  19. 19.154 × 4 =
  20. 20.61 × 4 =
  21. 21.21 × 8 =
  22. 22.101 × 4 =
  23. 23.14 × 8 =
  24. 24.46 × 8 =
  25. 25.87 × 4 =
  26. 26.44 × 4 =
  27. 27.17 × 8 =
  28. 28.43 × 8 =
  29. 29.79 × 4 =
  30. 30.145 × 4 =
  31. 31.29 × 8 =
  32. 32.35 × 8 =
  33. 33.139 × 4 =
  34. 34.44 × 8 =
  35. 35.12 × 8 =
  36. 36.146 × 4 =
  37. 37.18 × 4 =
  38. 38.159 × 4 =
  39. 39.127 × 4 =
  40. 40.52 × 8 =

Answer key

  1. 52
  2. 272
  3. 392
  4. 164
  5. 104
  6. 512
  7. 576
  8. 488
  9. 216
  10. 396
  11. 568
  12. 472
  13. 132
  14. 276
  15. 120
  16. 120
  17. 324
  18. 96
  19. 616
  20. 244
  21. 168
  22. 404
  23. 112
  24. 368
  25. 348
  26. 176
  27. 136
  28. 344
  29. 316
  30. 580
  31. 232
  32. 280
  33. 556
  34. 352
  35. 96
  36. 584
  37. 72
  38. 636
  39. 508
  40. 416

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