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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 414 · 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. 1.13 × 8 =
  2. 2.16 × 8 =
  3. 3.32 × 4 =
  4. 4.91 × 4 =
  5. 5.30 × 8 =
  6. 6.25 × 8 =
  7. 7.37 × 8 =
  8. 8.88 × 4 =
  9. 9.111 × 4 =
  10. 10.48 × 4 =
  11. 11.44 × 8 =
  12. 12.12 × 8 =
  13. 13.143 × 4 =
  14. 14.28 × 8 =
  15. 15.72 × 8 =
  16. 16.68 × 4 =
  17. 17.103 × 4 =
  18. 18.21 × 8 =
  19. 19.151 × 4 =
  20. 20.14 × 8 =
  21. 21.26 × 4 =
  22. 22.82 × 4 =
  23. 23.12 × 8 =
  24. 24.56 × 8 =
  25. 25.105 × 4 =
  26. 26.29 × 4 =
  27. 27.22 × 4 =
  28. 28.158 × 4 =
  29. 29.23 × 8 =
  30. 30.50 × 4 =
  31. 31.119 × 4 =
  32. 32.31 × 8 =
  33. 33.67 × 8 =
  34. 34.47 × 4 =
  35. 35.15 × 4 =
  36. 36.109 × 4 =
  37. 37.19 × 8 =
  38. 38.66 × 8 =
  39. 39.26 × 8 =
  40. 40.85 × 4 =

Answer key

  1. 104
  2. 128
  3. 128
  4. 364
  5. 240
  6. 200
  7. 296
  8. 352
  9. 444
  10. 192
  11. 352
  12. 96
  13. 572
  14. 224
  15. 576
  16. 272
  17. 412
  18. 168
  19. 604
  20. 112
  21. 104
  22. 328
  23. 96
  24. 448
  25. 420
  26. 116
  27. 88
  28. 632
  29. 184
  30. 200
  31. 476
  32. 248
  33. 536
  34. 188
  35. 60
  36. 436
  37. 152
  38. 528
  39. 208
  40. 340

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