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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 113 · 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. 1.33 × 8 =
  2. 2.55 × 4 =
  3. 3.46 × 8 =
  4. 4.92 × 4 =
  5. 5.91 × 4 =
  6. 6.45 × 4 =
  7. 7.75 × 8 =
  8. 8.15 × 4 =
  9. 9.47 × 4 =
  10. 10.73 × 8 =
  11. 11.151 × 4 =
  12. 12.68 × 4 =
  13. 13.152 × 4 =
  14. 14.54 × 8 =
  15. 15.66 × 8 =
  16. 16.83 × 4 =
  17. 17.39 × 8 =
  18. 18.67 × 8 =
  19. 19.17 × 4 =
  20. 20.15 × 8 =
  21. 21.42 × 4 =
  22. 22.22 × 8 =
  23. 23.29 × 8 =
  24. 24.50 × 8 =
  25. 25.14 × 8 =
  26. 26.61 × 4 =
  27. 27.33 × 4 =
  28. 28.29 × 8 =
  29. 29.22 × 4 =
  30. 30.33 × 4 =
  31. 31.30 × 4 =
  32. 32.53 × 8 =
  33. 33.107 × 4 =
  34. 34.89 × 4 =
  35. 35.46 × 8 =
  36. 36.44 × 4 =
  37. 37.139 × 4 =
  38. 38.99 × 4 =
  39. 39.31 × 4 =
  40. 40.73 × 8 =

Answer key

  1. 264
  2. 220
  3. 368
  4. 368
  5. 364
  6. 180
  7. 600
  8. 60
  9. 188
  10. 584
  11. 604
  12. 272
  13. 608
  14. 432
  15. 528
  16. 332
  17. 312
  18. 536
  19. 68
  20. 120
  21. 168
  22. 176
  23. 232
  24. 400
  25. 112
  26. 244
  27. 132
  28. 232
  29. 88
  30. 132
  31. 120
  32. 424
  33. 428
  34. 356
  35. 368
  36. 176
  37. 556
  38. 396
  39. 124
  40. 584

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