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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 348 · 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. 1.113 × 4 =
  2. 2.15 × 8 =
  3. 3.13 × 4 =
  4. 4.39 × 8 =
  5. 5.141 × 4 =
  6. 6.145 × 4 =
  7. 7.138 × 4 =
  8. 8.15 × 4 =
  9. 9.26 × 8 =
  10. 10.27 × 8 =
  11. 11.65 × 8 =
  12. 12.104 × 4 =
  13. 13.105 × 4 =
  14. 14.20 × 8 =
  15. 15.49 × 8 =
  16. 16.59 × 4 =
  17. 17.19 × 8 =
  18. 18.37 × 8 =
  19. 19.27 × 4 =
  20. 20.114 × 4 =
  21. 21.133 × 4 =
  22. 22.48 × 8 =
  23. 23.67 × 8 =
  24. 24.80 × 4 =
  25. 25.156 × 4 =
  26. 26.46 × 8 =
  27. 27.77 × 4 =
  28. 28.54 × 4 =
  29. 29.26 × 8 =
  30. 30.59 × 4 =
  31. 31.71 × 4 =
  32. 32.142 × 4 =
  33. 33.37 × 8 =
  34. 34.159 × 4 =
  35. 35.159 × 4 =
  36. 36.72 × 8 =
  37. 37.42 × 4 =
  38. 38.54 × 4 =
  39. 39.102 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 452
  2. 120
  3. 52
  4. 312
  5. 564
  6. 580
  7. 552
  8. 60
  9. 208
  10. 216
  11. 520
  12. 416
  13. 420
  14. 160
  15. 392
  16. 236
  17. 152
  18. 296
  19. 108
  20. 456
  21. 532
  22. 384
  23. 536
  24. 320
  25. 624
  26. 368
  27. 308
  28. 216
  29. 208
  30. 236
  31. 284
  32. 568
  33. 296
  34. 636
  35. 636
  36. 576
  37. 168
  38. 216
  39. 408
  40. 224

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