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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 991 · 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. 1.35 × 4 =
  2. 2.71 × 4 =
  3. 3.51 × 4 =
  4. 4.29 × 4 =
  5. 5.91 × 4 =
  6. 6.32 × 4 =
  7. 7.49 × 8 =
  8. 8.20 × 8 =
  9. 9.146 × 4 =
  10. 10.116 × 4 =
  11. 11.36 × 4 =
  12. 12.25 × 8 =
  13. 13.71 × 8 =
  14. 14.149 × 4 =
  15. 15.91 × 4 =
  16. 16.46 × 8 =
  17. 17.68 × 8 =
  18. 18.28 × 8 =
  19. 19.14 × 4 =
  20. 20.22 × 8 =
  21. 21.13 × 8 =
  22. 22.71 × 4 =
  23. 23.32 × 4 =
  24. 24.19 × 8 =
  25. 25.37 × 4 =
  26. 26.16 × 4 =
  27. 27.133 × 4 =
  28. 28.95 × 4 =
  29. 29.111 × 4 =
  30. 30.21 × 8 =
  31. 31.13 × 4 =
  32. 32.135 × 4 =
  33. 33.20 × 8 =
  34. 34.14 × 4 =
  35. 35.76 × 4 =
  36. 36.110 × 4 =
  37. 37.59 × 8 =
  38. 38.58 × 8 =
  39. 39.61 × 8 =
  40. 40.54 × 8 =

Answer key

  1. 140
  2. 284
  3. 204
  4. 116
  5. 364
  6. 128
  7. 392
  8. 160
  9. 584
  10. 464
  11. 144
  12. 200
  13. 568
  14. 596
  15. 364
  16. 368
  17. 544
  18. 224
  19. 56
  20. 176
  21. 104
  22. 284
  23. 128
  24. 152
  25. 148
  26. 64
  27. 532
  28. 380
  29. 444
  30. 168
  31. 52
  32. 540
  33. 160
  34. 56
  35. 304
  36. 440
  37. 472
  38. 464
  39. 488
  40. 432

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