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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 699 · 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. 1.48 × 4 =
  2. 2.89 × 4 =
  3. 3.89 × 4 =
  4. 4.71 × 8 =
  5. 5.117 × 4 =
  6. 6.22 × 4 =
  7. 7.66 × 8 =
  8. 8.159 × 4 =
  9. 9.26 × 8 =
  10. 10.64 × 8 =
  11. 11.16 × 8 =
  12. 12.20 × 8 =
  13. 13.52 × 8 =
  14. 14.66 × 8 =
  15. 15.130 × 4 =
  16. 16.120 × 4 =
  17. 17.35 × 4 =
  18. 18.19 × 4 =
  19. 19.40 × 4 =
  20. 20.100 × 4 =
  21. 21.108 × 4 =
  22. 22.66 × 4 =
  23. 23.63 × 4 =
  24. 24.68 × 8 =
  25. 25.124 × 4 =
  26. 26.22 × 8 =
  27. 27.145 × 4 =
  28. 28.19 × 8 =
  29. 29.70 × 8 =
  30. 30.156 × 4 =
  31. 31.73 × 8 =
  32. 32.114 × 4 =
  33. 33.64 × 4 =
  34. 34.34 × 4 =
  35. 35.66 × 8 =
  36. 36.114 × 4 =
  37. 37.12 × 8 =
  38. 38.72 × 4 =
  39. 39.65 × 8 =
  40. 40.73 × 8 =

Answer key

  1. 192
  2. 356
  3. 356
  4. 568
  5. 468
  6. 88
  7. 528
  8. 636
  9. 208
  10. 512
  11. 128
  12. 160
  13. 416
  14. 528
  15. 520
  16. 480
  17. 140
  18. 76
  19. 160
  20. 400
  21. 432
  22. 264
  23. 252
  24. 544
  25. 496
  26. 176
  27. 580
  28. 152
  29. 560
  30. 624
  31. 584
  32. 456
  33. 256
  34. 136
  35. 528
  36. 456
  37. 96
  38. 288
  39. 520
  40. 584

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