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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 802 · 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. 1.104 × 4 =
  2. 2.78 × 4 =
  3. 3.25 × 8 =
  4. 4.53 × 8 =
  5. 5.77 × 4 =
  6. 6.19 × 8 =
  7. 7.38 × 8 =
  8. 8.74 × 4 =
  9. 9.58 × 4 =
  10. 10.125 × 4 =
  11. 11.35 × 8 =
  12. 12.47 × 4 =
  13. 13.25 × 8 =
  14. 14.23 × 8 =
  15. 15.27 × 8 =
  16. 16.52 × 4 =
  17. 17.41 × 8 =
  18. 18.66 × 8 =
  19. 19.53 × 8 =
  20. 20.103 × 4 =
  21. 21.33 × 4 =
  22. 22.140 × 4 =
  23. 23.41 × 4 =
  24. 24.32 × 8 =
  25. 25.79 × 4 =
  26. 26.100 × 4 =
  27. 27.113 × 4 =
  28. 28.97 × 4 =
  29. 29.78 × 4 =
  30. 30.120 × 4 =
  31. 31.65 × 4 =
  32. 32.148 × 4 =
  33. 33.66 × 4 =
  34. 34.67 × 8 =
  35. 35.127 × 4 =
  36. 36.133 × 4 =
  37. 37.52 × 8 =
  38. 38.25 × 4 =
  39. 39.143 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 416
  2. 312
  3. 200
  4. 424
  5. 308
  6. 152
  7. 304
  8. 296
  9. 232
  10. 500
  11. 280
  12. 188
  13. 200
  14. 184
  15. 216
  16. 208
  17. 328
  18. 528
  19. 424
  20. 412
  21. 132
  22. 560
  23. 164
  24. 256
  25. 316
  26. 400
  27. 452
  28. 388
  29. 312
  30. 480
  31. 260
  32. 592
  33. 264
  34. 536
  35. 508
  36. 532
  37. 416
  38. 100
  39. 572
  40. 260

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