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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 239 · 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. 2.155 × 4 =
  3. 3.157 × 4 =
  4. 4.46 × 8 =
  5. 5.24 × 4 =
  6. 6.32 × 4 =
  7. 7.49 × 8 =
  8. 8.114 × 4 =
  9. 9.27 × 8 =
  10. 10.22 × 4 =
  11. 11.109 × 4 =
  12. 12.56 × 4 =
  13. 13.140 × 4 =
  14. 14.14 × 8 =
  15. 15.61 × 8 =
  16. 16.41 × 4 =
  17. 17.13 × 8 =
  18. 18.18 × 8 =
  19. 19.42 × 8 =
  20. 20.67 × 4 =
  21. 21.23 × 4 =
  22. 22.30 × 8 =
  23. 23.41 × 8 =
  24. 24.52 × 8 =
  25. 25.72 × 4 =
  26. 26.12 × 8 =
  27. 27.74 × 8 =
  28. 28.152 × 4 =
  29. 29.87 × 4 =
  30. 30.43 × 8 =
  31. 31.27 × 8 =
  32. 32.54 × 8 =
  33. 33.97 × 4 =
  34. 34.67 × 8 =
  35. 35.48 × 4 =
  36. 36.50 × 4 =
  37. 37.44 × 8 =
  38. 38.44 × 8 =
  39. 39.40 × 8 =
  40. 40.57 × 8 =

Answer key

  1. 336
  2. 620
  3. 628
  4. 368
  5. 96
  6. 128
  7. 392
  8. 456
  9. 216
  10. 88
  11. 436
  12. 224
  13. 560
  14. 112
  15. 488
  16. 164
  17. 104
  18. 144
  19. 336
  20. 268
  21. 92
  22. 240
  23. 328
  24. 416
  25. 288
  26. 96
  27. 592
  28. 608
  29. 348
  30. 344
  31. 216
  32. 432
  33. 388
  34. 536
  35. 192
  36. 200
  37. 352
  38. 352
  39. 320
  40. 456

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