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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 978 · 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. 1.28 × 8 =
  2. 2.44 × 8 =
  3. 3.30 × 4 =
  4. 4.65 × 8 =
  5. 5.19 × 8 =
  6. 6.81 × 4 =
  7. 7.35 × 4 =
  8. 8.48 × 4 =
  9. 9.155 × 4 =
  10. 10.67 × 8 =
  11. 11.72 × 8 =
  12. 12.114 × 4 =
  13. 13.67 × 8 =
  14. 14.35 × 4 =
  15. 15.67 × 8 =
  16. 16.37 × 4 =
  17. 17.84 × 4 =
  18. 18.57 × 8 =
  19. 19.92 × 4 =
  20. 20.31 × 4 =
  21. 21.46 × 8 =
  22. 22.71 × 8 =
  23. 23.13 × 8 =
  24. 24.62 × 8 =
  25. 25.39 × 8 =
  26. 26.126 × 4 =
  27. 27.118 × 4 =
  28. 28.13 × 8 =
  29. 29.126 × 4 =
  30. 30.59 × 4 =
  31. 31.37 × 4 =
  32. 32.53 × 4 =
  33. 33.139 × 4 =
  34. 34.18 × 8 =
  35. 35.109 × 4 =
  36. 36.105 × 4 =
  37. 37.151 × 4 =
  38. 38.71 × 4 =
  39. 39.35 × 8 =
  40. 40.84 × 4 =

Answer key

  1. 224
  2. 352
  3. 120
  4. 520
  5. 152
  6. 324
  7. 140
  8. 192
  9. 620
  10. 536
  11. 576
  12. 456
  13. 536
  14. 140
  15. 536
  16. 148
  17. 336
  18. 456
  19. 368
  20. 124
  21. 368
  22. 568
  23. 104
  24. 496
  25. 312
  26. 504
  27. 472
  28. 104
  29. 504
  30. 236
  31. 148
  32. 212
  33. 556
  34. 144
  35. 436
  36. 420
  37. 604
  38. 284
  39. 280
  40. 336

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