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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 781 · 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. 1.53 × 8 =
  2. 2.31 × 4 =
  3. 3.107 × 4 =
  4. 4.59 × 4 =
  5. 5.58 × 4 =
  6. 6.59 × 8 =
  7. 7.59 × 4 =
  8. 8.154 × 4 =
  9. 9.29 × 8 =
  10. 10.77 × 4 =
  11. 11.44 × 8 =
  12. 12.17 × 4 =
  13. 13.30 × 8 =
  14. 14.19 × 8 =
  15. 15.49 × 8 =
  16. 16.74 × 8 =
  17. 17.112 × 4 =
  18. 18.26 × 8 =
  19. 19.51 × 4 =
  20. 20.21 × 4 =
  21. 21.48 × 8 =
  22. 22.120 × 4 =
  23. 23.99 × 4 =
  24. 24.43 × 8 =
  25. 25.110 × 4 =
  26. 26.37 × 8 =
  27. 27.34 × 8 =
  28. 28.32 × 8 =
  29. 29.15 × 8 =
  30. 30.18 × 8 =
  31. 31.61 × 8 =
  32. 32.151 × 4 =
  33. 33.18 × 8 =
  34. 34.14 × 8 =
  35. 35.23 × 4 =
  36. 36.28 × 4 =
  37. 37.72 × 8 =
  38. 38.49 × 8 =
  39. 39.41 × 8 =
  40. 40.19 × 4 =

Answer key

  1. 424
  2. 124
  3. 428
  4. 236
  5. 232
  6. 472
  7. 236
  8. 616
  9. 232
  10. 308
  11. 352
  12. 68
  13. 240
  14. 152
  15. 392
  16. 592
  17. 448
  18. 208
  19. 204
  20. 84
  21. 384
  22. 480
  23. 396
  24. 344
  25. 440
  26. 296
  27. 272
  28. 256
  29. 120
  30. 144
  31. 488
  32. 604
  33. 144
  34. 112
  35. 92
  36. 112
  37. 576
  38. 392
  39. 328
  40. 76

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