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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 604 · 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. 1.87 × 4 =
  2. 2.66 × 8 =
  3. 3.68 × 8 =
  4. 4.123 × 4 =
  5. 5.62 × 8 =
  6. 6.26 × 8 =
  7. 7.67 × 8 =
  8. 8.49 × 8 =
  9. 9.148 × 4 =
  10. 10.44 × 4 =
  11. 11.45 × 8 =
  12. 12.116 × 4 =
  13. 13.143 × 4 =
  14. 14.36 × 8 =
  15. 15.16 × 8 =
  16. 16.18 × 8 =
  17. 17.25 × 4 =
  18. 18.46 × 8 =
  19. 19.147 × 4 =
  20. 20.19 × 8 =
  21. 21.28 × 8 =
  22. 22.73 × 8 =
  23. 23.28 × 4 =
  24. 24.80 × 4 =
  25. 25.150 × 4 =
  26. 26.86 × 4 =
  27. 27.52 × 4 =
  28. 28.33 × 8 =
  29. 29.147 × 4 =
  30. 30.73 × 4 =
  31. 31.60 × 8 =
  32. 32.59 × 4 =
  33. 33.15 × 4 =
  34. 34.42 × 8 =
  35. 35.127 × 4 =
  36. 36.122 × 4 =
  37. 37.61 × 8 =
  38. 38.67 × 4 =
  39. 39.50 × 8 =
  40. 40.49 × 4 =

Answer key

  1. 348
  2. 528
  3. 544
  4. 492
  5. 496
  6. 208
  7. 536
  8. 392
  9. 592
  10. 176
  11. 360
  12. 464
  13. 572
  14. 288
  15. 128
  16. 144
  17. 100
  18. 368
  19. 588
  20. 152
  21. 224
  22. 584
  23. 112
  24. 320
  25. 600
  26. 344
  27. 208
  28. 264
  29. 588
  30. 292
  31. 480
  32. 236
  33. 60
  34. 336
  35. 508
  36. 488
  37. 488
  38. 268
  39. 400
  40. 196

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