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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 293 · 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. 1.47 × 8 =
  2. 2.112 × 4 =
  3. 3.42 × 4 =
  4. 4.45 × 8 =
  5. 5.33 × 8 =
  6. 6.59 × 8 =
  7. 7.54 × 8 =
  8. 8.90 × 4 =
  9. 9.56 × 8 =
  10. 10.51 × 4 =
  11. 11.40 × 8 =
  12. 12.109 × 4 =
  13. 13.127 × 4 =
  14. 14.128 × 4 =
  15. 15.48 × 4 =
  16. 16.59 × 8 =
  17. 17.98 × 4 =
  18. 18.22 × 8 =
  19. 19.21 × 8 =
  20. 20.122 × 4 =
  21. 21.66 × 4 =
  22. 22.18 × 4 =
  23. 23.29 × 8 =
  24. 24.116 × 4 =
  25. 25.58 × 4 =
  26. 26.74 × 4 =
  27. 27.14 × 8 =
  28. 28.26 × 4 =
  29. 29.49 × 8 =
  30. 30.154 × 4 =
  31. 31.92 × 4 =
  32. 32.94 × 4 =
  33. 33.26 × 8 =
  34. 34.29 × 4 =
  35. 35.52 × 8 =
  36. 36.21 × 8 =
  37. 37.132 × 4 =
  38. 38.129 × 4 =
  39. 39.77 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 376
  2. 448
  3. 168
  4. 360
  5. 264
  6. 472
  7. 432
  8. 360
  9. 448
  10. 204
  11. 320
  12. 436
  13. 508
  14. 512
  15. 192
  16. 472
  17. 392
  18. 176
  19. 168
  20. 488
  21. 264
  22. 72
  23. 232
  24. 464
  25. 232
  26. 296
  27. 112
  28. 104
  29. 392
  30. 616
  31. 368
  32. 376
  33. 208
  34. 116
  35. 416
  36. 168
  37. 528
  38. 516
  39. 308
  40. 264

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