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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 918 · 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. 1.72 × 8 =
  2. 2.26 × 4 =
  3. 3.18 × 8 =
  4. 4.38 × 8 =
  5. 5.101 × 4 =
  6. 6.88 × 4 =
  7. 7.55 × 4 =
  8. 8.24 × 8 =
  9. 9.26 × 8 =
  10. 10.74 × 8 =
  11. 11.18 × 8 =
  12. 12.102 × 4 =
  13. 13.100 × 4 =
  14. 14.21 × 8 =
  15. 15.58 × 4 =
  16. 16.143 × 4 =
  17. 17.143 × 4 =
  18. 18.48 × 4 =
  19. 19.33 × 4 =
  20. 20.80 × 4 =
  21. 21.64 × 8 =
  22. 22.96 × 4 =
  23. 23.104 × 4 =
  24. 24.15 × 8 =
  25. 25.48 × 8 =
  26. 26.125 × 4 =
  27. 27.65 × 8 =
  28. 28.40 × 8 =
  29. 29.148 × 4 =
  30. 30.27 × 8 =
  31. 31.73 × 8 =
  32. 32.12 × 8 =
  33. 33.72 × 8 =
  34. 34.46 × 8 =
  35. 35.134 × 4 =
  36. 36.113 × 4 =
  37. 37.24 × 4 =
  38. 38.34 × 8 =
  39. 39.38 × 8 =
  40. 40.70 × 4 =

Answer key

  1. 576
  2. 104
  3. 144
  4. 304
  5. 404
  6. 352
  7. 220
  8. 192
  9. 208
  10. 592
  11. 144
  12. 408
  13. 400
  14. 168
  15. 232
  16. 572
  17. 572
  18. 192
  19. 132
  20. 320
  21. 512
  22. 384
  23. 416
  24. 120
  25. 384
  26. 500
  27. 520
  28. 320
  29. 592
  30. 216
  31. 584
  32. 96
  33. 576
  34. 368
  35. 536
  36. 452
  37. 96
  38. 272
  39. 304
  40. 280

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