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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 929 · 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. 1.152 × 4 =
  2. 2.63 × 8 =
  3. 3.92 × 4 =
  4. 4.142 × 4 =
  5. 5.42 × 4 =
  6. 6.66 × 8 =
  7. 7.33 × 4 =
  8. 8.150 × 4 =
  9. 9.33 × 4 =
  10. 10.33 × 8 =
  11. 11.38 × 8 =
  12. 12.106 × 4 =
  13. 13.96 × 4 =
  14. 14.50 × 8 =
  15. 15.17 × 8 =
  16. 16.36 × 8 =
  17. 17.105 × 4 =
  18. 18.68 × 4 =
  19. 19.124 × 4 =
  20. 20.13 × 8 =
  21. 21.48 × 4 =
  22. 22.15 × 8 =
  23. 23.120 × 4 =
  24. 24.19 × 8 =
  25. 25.13 × 4 =
  26. 26.48 × 8 =
  27. 27.144 × 4 =
  28. 28.19 × 8 =
  29. 29.117 × 4 =
  30. 30.56 × 8 =
  31. 31.14 × 4 =
  32. 32.125 × 4 =
  33. 33.17 × 4 =
  34. 34.39 × 4 =
  35. 35.105 × 4 =
  36. 36.50 × 4 =
  37. 37.90 × 4 =
  38. 38.157 × 4 =
  39. 39.27 × 8 =
  40. 40.138 × 4 =

Answer key

  1. 608
  2. 504
  3. 368
  4. 568
  5. 168
  6. 528
  7. 132
  8. 600
  9. 132
  10. 264
  11. 304
  12. 424
  13. 384
  14. 400
  15. 136
  16. 288
  17. 420
  18. 272
  19. 496
  20. 104
  21. 192
  22. 120
  23. 480
  24. 152
  25. 52
  26. 384
  27. 576
  28. 152
  29. 468
  30. 448
  31. 56
  32. 500
  33. 68
  34. 156
  35. 420
  36. 200
  37. 360
  38. 628
  39. 216
  40. 552

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