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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 556 · 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. 1.42 × 8 =
  2. 2.48 × 4 =
  3. 3.41 × 8 =
  4. 4.47 × 8 =
  5. 5.27 × 8 =
  6. 6.53 × 8 =
  7. 7.132 × 4 =
  8. 8.89 × 4 =
  9. 9.30 × 8 =
  10. 10.159 × 4 =
  11. 11.16 × 4 =
  12. 12.70 × 8 =
  13. 13.53 × 4 =
  14. 14.140 × 4 =
  15. 15.30 × 4 =
  16. 16.69 × 8 =
  17. 17.77 × 4 =
  18. 18.52 × 8 =
  19. 19.134 × 4 =
  20. 20.20 × 8 =
  21. 21.109 × 4 =
  22. 22.133 × 4 =
  23. 23.150 × 4 =
  24. 24.74 × 8 =
  25. 25.133 × 4 =
  26. 26.13 × 8 =
  27. 27.27 × 8 =
  28. 28.76 × 4 =
  29. 29.38 × 8 =
  30. 30.32 × 8 =
  31. 31.120 × 4 =
  32. 32.56 × 4 =
  33. 33.38 × 8 =
  34. 34.43 × 4 =
  35. 35.41 × 8 =
  36. 36.50 × 8 =
  37. 37.78 × 4 =
  38. 38.20 × 8 =
  39. 39.60 × 8 =
  40. 40.65 × 8 =

Answer key

  1. 336
  2. 192
  3. 328
  4. 376
  5. 216
  6. 424
  7. 528
  8. 356
  9. 240
  10. 636
  11. 64
  12. 560
  13. 212
  14. 560
  15. 120
  16. 552
  17. 308
  18. 416
  19. 536
  20. 160
  21. 436
  22. 532
  23. 600
  24. 592
  25. 532
  26. 104
  27. 216
  28. 304
  29. 304
  30. 256
  31. 480
  32. 224
  33. 304
  34. 172
  35. 328
  36. 400
  37. 312
  38. 160
  39. 480
  40. 520

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