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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 196 · 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. 1.62 × 4 =
  2. 2.121 × 4 =
  3. 3.128 × 4 =
  4. 4.25 × 8 =
  5. 5.19 × 4 =
  6. 6.132 × 4 =
  7. 7.28 × 8 =
  8. 8.46 × 8 =
  9. 9.102 × 4 =
  10. 10.65 × 8 =
  11. 11.147 × 4 =
  12. 12.58 × 4 =
  13. 13.63 × 8 =
  14. 14.58 × 8 =
  15. 15.14 × 8 =
  16. 16.61 × 4 =
  17. 17.64 × 8 =
  18. 18.118 × 4 =
  19. 19.16 × 8 =
  20. 20.15 × 4 =
  21. 21.113 × 4 =
  22. 22.19 × 8 =
  23. 23.49 × 4 =
  24. 24.130 × 4 =
  25. 25.46 × 8 =
  26. 26.36 × 8 =
  27. 27.105 × 4 =
  28. 28.65 × 8 =
  29. 29.33 × 8 =
  30. 30.38 × 4 =
  31. 31.15 × 4 =
  32. 32.31 × 8 =
  33. 33.54 × 8 =
  34. 34.34 × 4 =
  35. 35.114 × 4 =
  36. 36.142 × 4 =
  37. 37.37 × 4 =
  38. 38.133 × 4 =
  39. 39.55 × 8 =
  40. 40.94 × 4 =

Answer key

  1. 248
  2. 484
  3. 512
  4. 200
  5. 76
  6. 528
  7. 224
  8. 368
  9. 408
  10. 520
  11. 588
  12. 232
  13. 504
  14. 464
  15. 112
  16. 244
  17. 512
  18. 472
  19. 128
  20. 60
  21. 452
  22. 152
  23. 196
  24. 520
  25. 368
  26. 288
  27. 420
  28. 520
  29. 264
  30. 152
  31. 60
  32. 248
  33. 432
  34. 136
  35. 456
  36. 568
  37. 148
  38. 532
  39. 440
  40. 376

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