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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 210 · 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. 1.102 × 4 =
  2. 2.26 × 8 =
  3. 3.61 × 8 =
  4. 4.72 × 8 =
  5. 5.107 × 4 =
  6. 6.94 × 4 =
  7. 7.27 × 8 =
  8. 8.54 × 8 =
  9. 9.111 × 4 =
  10. 10.120 × 4 =
  11. 11.31 × 8 =
  12. 12.36 × 8 =
  13. 13.94 × 4 =
  14. 14.29 × 8 =
  15. 15.102 × 4 =
  16. 16.105 × 4 =
  17. 17.25 × 8 =
  18. 18.72 × 8 =
  19. 19.16 × 4 =
  20. 20.132 × 4 =
  21. 21.134 × 4 =
  22. 22.66 × 8 =
  23. 23.116 × 4 =
  24. 24.78 × 4 =
  25. 25.115 × 4 =
  26. 26.153 × 4 =
  27. 27.33 × 8 =
  28. 28.133 × 4 =
  29. 29.26 × 8 =
  30. 30.149 × 4 =
  31. 31.87 × 4 =
  32. 32.152 × 4 =
  33. 33.67 × 8 =
  34. 34.126 × 4 =
  35. 35.57 × 8 =
  36. 36.41 × 4 =
  37. 37.29 × 8 =
  38. 38.72 × 4 =
  39. 39.27 × 4 =
  40. 40.111 × 4 =

Answer key

  1. 408
  2. 208
  3. 488
  4. 576
  5. 428
  6. 376
  7. 216
  8. 432
  9. 444
  10. 480
  11. 248
  12. 288
  13. 376
  14. 232
  15. 408
  16. 420
  17. 200
  18. 576
  19. 64
  20. 528
  21. 536
  22. 528
  23. 464
  24. 312
  25. 460
  26. 612
  27. 264
  28. 532
  29. 208
  30. 596
  31. 348
  32. 608
  33. 536
  34. 504
  35. 456
  36. 164
  37. 232
  38. 288
  39. 108
  40. 444

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