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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 66 · 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. 1.32 × 8 =
  2. 2.68 × 8 =
  3. 3.133 × 4 =
  4. 4.36 × 4 =
  5. 5.19 × 8 =
  6. 6.23 × 8 =
  7. 7.26 × 4 =
  8. 8.19 × 8 =
  9. 9.71 × 8 =
  10. 10.25 × 4 =
  11. 11.63 × 4 =
  12. 12.81 × 4 =
  13. 13.60 × 4 =
  14. 14.50 × 8 =
  15. 15.20 × 8 =
  16. 16.13 × 8 =
  17. 17.158 × 4 =
  18. 18.62 × 4 =
  19. 19.65 × 4 =
  20. 20.26 × 4 =
  21. 21.21 × 8 =
  22. 22.20 × 8 =
  23. 23.54 × 4 =
  24. 24.36 × 4 =
  25. 25.74 × 8 =
  26. 26.67 × 8 =
  27. 27.22 × 4 =
  28. 28.89 × 4 =
  29. 29.21 × 8 =
  30. 30.79 × 4 =
  31. 31.61 × 8 =
  32. 32.69 × 8 =
  33. 33.71 × 8 =
  34. 34.130 × 4 =
  35. 35.143 × 4 =
  36. 36.40 × 8 =
  37. 37.41 × 8 =
  38. 38.27 × 4 =
  39. 39.107 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 256
  2. 544
  3. 532
  4. 144
  5. 152
  6. 184
  7. 104
  8. 152
  9. 568
  10. 100
  11. 252
  12. 324
  13. 240
  14. 400
  15. 160
  16. 104
  17. 632
  18. 248
  19. 260
  20. 104
  21. 168
  22. 160
  23. 216
  24. 144
  25. 592
  26. 536
  27. 88
  28. 356
  29. 168
  30. 316
  31. 488
  32. 552
  33. 568
  34. 520
  35. 572
  36. 320
  37. 328
  38. 108
  39. 428
  40. 408

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