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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 825 · 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. 1.111 × 4 =
  2. 2.32 × 4 =
  3. 3.100 × 4 =
  4. 4.46 × 4 =
  5. 5.54 × 8 =
  6. 6.29 × 8 =
  7. 7.52 × 4 =
  8. 8.116 × 4 =
  9. 9.33 × 8 =
  10. 10.67 × 4 =
  11. 11.95 × 4 =
  12. 12.70 × 8 =
  13. 13.15 × 8 =
  14. 14.41 × 8 =
  15. 15.43 × 8 =
  16. 16.67 × 8 =
  17. 17.26 × 8 =
  18. 18.22 × 8 =
  19. 19.21 × 8 =
  20. 20.28 × 8 =
  21. 21.15 × 8 =
  22. 22.114 × 4 =
  23. 23.71 × 8 =
  24. 24.26 × 8 =
  25. 25.23 × 8 =
  26. 26.51 × 4 =
  27. 27.143 × 4 =
  28. 28.25 × 4 =
  29. 29.43 × 8 =
  30. 30.127 × 4 =
  31. 31.37 × 8 =
  32. 32.30 × 8 =
  33. 33.54 × 8 =
  34. 34.19 × 8 =
  35. 35.51 × 8 =
  36. 36.93 × 4 =
  37. 37.22 × 8 =
  38. 38.47 × 4 =
  39. 39.119 × 4 =
  40. 40.61 × 8 =

Answer key

  1. 444
  2. 128
  3. 400
  4. 184
  5. 432
  6. 232
  7. 208
  8. 464
  9. 264
  10. 268
  11. 380
  12. 560
  13. 120
  14. 328
  15. 344
  16. 536
  17. 208
  18. 176
  19. 168
  20. 224
  21. 120
  22. 456
  23. 568
  24. 208
  25. 184
  26. 204
  27. 572
  28. 100
  29. 344
  30. 508
  31. 296
  32. 240
  33. 432
  34. 152
  35. 408
  36. 372
  37. 176
  38. 188
  39. 476
  40. 488

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