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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 123 · 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. 1.39 × 8 =
  2. 2.67 × 8 =
  3. 3.94 × 4 =
  4. 4.109 × 4 =
  5. 5.47 × 4 =
  6. 6.21 × 8 =
  7. 7.65 × 4 =
  8. 8.28 × 8 =
  9. 9.39 × 4 =
  10. 10.49 × 8 =
  11. 11.45 × 4 =
  12. 12.72 × 4 =
  13. 13.49 × 4 =
  14. 14.28 × 8 =
  15. 15.20 × 4 =
  16. 16.17 × 8 =
  17. 17.39 × 4 =
  18. 18.35 × 8 =
  19. 19.31 × 4 =
  20. 20.115 × 4 =
  21. 21.28 × 4 =
  22. 22.79 × 4 =
  23. 23.52 × 4 =
  24. 24.54 × 4 =
  25. 25.40 × 4 =
  26. 26.159 × 4 =
  27. 27.92 × 4 =
  28. 28.55 × 4 =
  29. 29.37 × 8 =
  30. 30.19 × 8 =
  31. 31.101 × 4 =
  32. 32.40 × 4 =
  33. 33.39 × 8 =
  34. 34.25 × 4 =
  35. 35.74 × 8 =
  36. 36.42 × 8 =
  37. 37.93 × 4 =
  38. 38.86 × 4 =
  39. 39.13 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 312
  2. 536
  3. 376
  4. 436
  5. 188
  6. 168
  7. 260
  8. 224
  9. 156
  10. 392
  11. 180
  12. 288
  13. 196
  14. 224
  15. 80
  16. 136
  17. 156
  18. 280
  19. 124
  20. 460
  21. 112
  22. 316
  23. 208
  24. 216
  25. 160
  26. 636
  27. 368
  28. 220
  29. 296
  30. 152
  31. 404
  32. 160
  33. 312
  34. 100
  35. 592
  36. 336
  37. 372
  38. 344
  39. 104
  40. 296

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