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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 907 · 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. 1.127 × 4 =
  2. 2.48 × 8 =
  3. 3.17 × 4 =
  4. 4.96 × 4 =
  5. 5.56 × 8 =
  6. 6.132 × 4 =
  7. 7.135 × 4 =
  8. 8.28 × 8 =
  9. 9.33 × 8 =
  10. 10.97 × 4 =
  11. 11.63 × 4 =
  12. 12.44 × 4 =
  13. 13.134 × 4 =
  14. 14.55 × 8 =
  15. 15.73 × 8 =
  16. 16.154 × 4 =
  17. 17.41 × 8 =
  18. 18.66 × 8 =
  19. 19.12 × 8 =
  20. 20.15 × 8 =
  21. 21.73 × 8 =
  22. 22.52 × 4 =
  23. 23.19 × 8 =
  24. 24.98 × 4 =
  25. 25.30 × 8 =
  26. 26.46 × 8 =
  27. 27.146 × 4 =
  28. 28.28 × 4 =
  29. 29.58 × 4 =
  30. 30.128 × 4 =
  31. 31.85 × 4 =
  32. 32.70 × 8 =
  33. 33.16 × 8 =
  34. 34.36 × 8 =
  35. 35.111 × 4 =
  36. 36.118 × 4 =
  37. 37.63 × 8 =
  38. 38.23 × 8 =
  39. 39.21 × 8 =
  40. 40.48 × 8 =

Answer key

  1. 508
  2. 384
  3. 68
  4. 384
  5. 448
  6. 528
  7. 540
  8. 224
  9. 264
  10. 388
  11. 252
  12. 176
  13. 536
  14. 440
  15. 584
  16. 616
  17. 328
  18. 528
  19. 96
  20. 120
  21. 584
  22. 208
  23. 152
  24. 392
  25. 240
  26. 368
  27. 584
  28. 112
  29. 232
  30. 512
  31. 340
  32. 560
  33. 128
  34. 288
  35. 444
  36. 472
  37. 504
  38. 184
  39. 168
  40. 384

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