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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 996 · 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. 1.47 × 4 =
  2. 2.127 × 4 =
  3. 3.13 × 8 =
  4. 4.42 × 8 =
  5. 5.12 × 8 =
  6. 6.30 × 4 =
  7. 7.13 × 8 =
  8. 8.63 × 8 =
  9. 9.111 × 4 =
  10. 10.54 × 8 =
  11. 11.47 × 4 =
  12. 12.40 × 8 =
  13. 13.14 × 8 =
  14. 14.63 × 8 =
  15. 15.73 × 8 =
  16. 16.72 × 8 =
  17. 17.26 × 8 =
  18. 18.43 × 8 =
  19. 19.101 × 4 =
  20. 20.67 × 4 =
  21. 21.63 × 4 =
  22. 22.119 × 4 =
  23. 23.148 × 4 =
  24. 24.43 × 8 =
  25. 25.23 × 8 =
  26. 26.72 × 8 =
  27. 27.141 × 4 =
  28. 28.68 × 4 =
  29. 29.19 × 8 =
  30. 30.79 × 4 =
  31. 31.31 × 8 =
  32. 32.34 × 8 =
  33. 33.158 × 4 =
  34. 34.106 × 4 =
  35. 35.111 × 4 =
  36. 36.71 × 8 =
  37. 37.54 × 8 =
  38. 38.40 × 8 =
  39. 39.53 × 8 =
  40. 40.143 × 4 =

Answer key

  1. 188
  2. 508
  3. 104
  4. 336
  5. 96
  6. 120
  7. 104
  8. 504
  9. 444
  10. 432
  11. 188
  12. 320
  13. 112
  14. 504
  15. 584
  16. 576
  17. 208
  18. 344
  19. 404
  20. 268
  21. 252
  22. 476
  23. 592
  24. 344
  25. 184
  26. 576
  27. 564
  28. 272
  29. 152
  30. 316
  31. 248
  32. 272
  33. 632
  34. 424
  35. 444
  36. 568
  37. 432
  38. 320
  39. 424
  40. 572

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