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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 613 · 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. 1.26 × 4 =
  2. 2.37 × 8 =
  3. 3.74 × 8 =
  4. 4.124 × 4 =
  5. 5.29 × 8 =
  6. 6.33 × 8 =
  7. 7.86 × 4 =
  8. 8.93 × 4 =
  9. 9.66 × 8 =
  10. 10.51 × 4 =
  11. 11.75 × 4 =
  12. 12.41 × 4 =
  13. 13.60 × 8 =
  14. 14.67 × 8 =
  15. 15.52 × 8 =
  16. 16.118 × 4 =
  17. 17.18 × 8 =
  18. 18.113 × 4 =
  19. 19.104 × 4 =
  20. 20.74 × 8 =
  21. 21.70 × 4 =
  22. 22.113 × 4 =
  23. 23.53 × 8 =
  24. 24.23 × 4 =
  25. 25.17 × 8 =
  26. 26.47 × 4 =
  27. 27.26 × 8 =
  28. 28.133 × 4 =
  29. 29.63 × 4 =
  30. 30.66 × 4 =
  31. 31.133 × 4 =
  32. 32.141 × 4 =
  33. 33.17 × 8 =
  34. 34.72 × 8 =
  35. 35.144 × 4 =
  36. 36.15 × 4 =
  37. 37.15 × 4 =
  38. 38.21 × 8 =
  39. 39.82 × 4 =
  40. 40.46 × 8 =

Answer key

  1. 104
  2. 296
  3. 592
  4. 496
  5. 232
  6. 264
  7. 344
  8. 372
  9. 528
  10. 204
  11. 300
  12. 164
  13. 480
  14. 536
  15. 416
  16. 472
  17. 144
  18. 452
  19. 416
  20. 592
  21. 280
  22. 452
  23. 424
  24. 92
  25. 136
  26. 188
  27. 208
  28. 532
  29. 252
  30. 264
  31. 532
  32. 564
  33. 136
  34. 576
  35. 576
  36. 60
  37. 60
  38. 168
  39. 328
  40. 368

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