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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 675 · 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. 1.22 × 4 =
  2. 2.47 × 4 =
  3. 3.16 × 8 =
  4. 4.73 × 8 =
  5. 5.28 × 4 =
  6. 6.103 × 4 =
  7. 7.72 × 8 =
  8. 8.44 × 4 =
  9. 9.141 × 4 =
  10. 10.41 × 8 =
  11. 11.79 × 4 =
  12. 12.17 × 8 =
  13. 13.54 × 8 =
  14. 14.20 × 4 =
  15. 15.42 × 4 =
  16. 16.60 × 8 =
  17. 17.77 × 4 =
  18. 18.96 × 4 =
  19. 19.30 × 8 =
  20. 20.24 × 4 =
  21. 21.85 × 4 =
  22. 22.35 × 4 =
  23. 23.68 × 4 =
  24. 24.19 × 8 =
  25. 25.59 × 8 =
  26. 26.19 × 4 =
  27. 27.61 × 4 =
  28. 28.23 × 8 =
  29. 29.24 × 8 =
  30. 30.21 × 4 =
  31. 31.49 × 4 =
  32. 32.97 × 4 =
  33. 33.141 × 4 =
  34. 34.152 × 4 =
  35. 35.25 × 4 =
  36. 36.97 × 4 =
  37. 37.25 × 8 =
  38. 38.120 × 4 =
  39. 39.94 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 88
  2. 188
  3. 128
  4. 584
  5. 112
  6. 412
  7. 576
  8. 176
  9. 564
  10. 328
  11. 316
  12. 136
  13. 432
  14. 80
  15. 168
  16. 480
  17. 308
  18. 384
  19. 240
  20. 96
  21. 340
  22. 140
  23. 272
  24. 152
  25. 472
  26. 76
  27. 244
  28. 184
  29. 192
  30. 84
  31. 196
  32. 388
  33. 564
  34. 608
  35. 100
  36. 388
  37. 200
  38. 480
  39. 376
  40. 216

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