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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 522 · 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 × 8 =
  2. 2.31 × 8 =
  3. 3.149 × 4 =
  4. 4.31 × 4 =
  5. 5.91 × 4 =
  6. 6.154 × 4 =
  7. 7.33 × 4 =
  8. 8.45 × 8 =
  9. 9.32 × 4 =
  10. 10.78 × 4 =
  11. 11.48 × 8 =
  12. 12.17 × 8 =
  13. 13.123 × 4 =
  14. 14.49 × 8 =
  15. 15.46 × 8 =
  16. 16.28 × 8 =
  17. 17.114 × 4 =
  18. 18.58 × 8 =
  19. 19.16 × 8 =
  20. 20.85 × 4 =
  21. 21.12 × 8 =
  22. 22.62 × 8 =
  23. 23.145 × 4 =
  24. 24.44 × 4 =
  25. 25.23 × 8 =
  26. 26.22 × 4 =
  27. 27.71 × 8 =
  28. 28.140 × 4 =
  29. 29.45 × 8 =
  30. 30.33 × 4 =
  31. 31.71 × 8 =
  32. 32.75 × 8 =
  33. 33.44 × 4 =
  34. 34.125 × 4 =
  35. 35.122 × 4 =
  36. 36.27 × 8 =
  37. 37.34 × 4 =
  38. 38.56 × 8 =
  39. 39.95 × 4 =
  40. 40.19 × 4 =

Answer key

  1. 208
  2. 248
  3. 596
  4. 124
  5. 364
  6. 616
  7. 132
  8. 360
  9. 128
  10. 312
  11. 384
  12. 136
  13. 492
  14. 392
  15. 368
  16. 224
  17. 456
  18. 464
  19. 128
  20. 340
  21. 96
  22. 496
  23. 580
  24. 176
  25. 184
  26. 88
  27. 568
  28. 560
  29. 360
  30. 132
  31. 568
  32. 600
  33. 176
  34. 500
  35. 488
  36. 216
  37. 136
  38. 448
  39. 380
  40. 76

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