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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 906 · 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. 1.66 × 8 =
  2. 2.17 × 4 =
  3. 3.61 × 4 =
  4. 4.20 × 4 =
  5. 5.14 × 8 =
  6. 6.65 × 4 =
  7. 7.18 × 8 =
  8. 8.26 × 8 =
  9. 9.48 × 8 =
  10. 10.61 × 8 =
  11. 11.128 × 4 =
  12. 12.102 × 4 =
  13. 13.29 × 8 =
  14. 14.155 × 4 =
  15. 15.67 × 8 =
  16. 16.16 × 8 =
  17. 17.66 × 8 =
  18. 18.144 × 4 =
  19. 19.68 × 4 =
  20. 20.115 × 4 =
  21. 21.66 × 8 =
  22. 22.51 × 8 =
  23. 23.134 × 4 =
  24. 24.65 × 8 =
  25. 25.66 × 8 =
  26. 26.73 × 4 =
  27. 27.38 × 8 =
  28. 28.106 × 4 =
  29. 29.86 × 4 =
  30. 30.128 × 4 =
  31. 31.16 × 8 =
  32. 32.37 × 4 =
  33. 33.82 × 4 =
  34. 34.65 × 8 =
  35. 35.37 × 8 =
  36. 36.34 × 4 =
  37. 37.43 × 8 =
  38. 38.16 × 8 =
  39. 39.38 × 8 =
  40. 40.60 × 4 =

Answer key

  1. 528
  2. 68
  3. 244
  4. 80
  5. 112
  6. 260
  7. 144
  8. 208
  9. 384
  10. 488
  11. 512
  12. 408
  13. 232
  14. 620
  15. 536
  16. 128
  17. 528
  18. 576
  19. 272
  20. 460
  21. 528
  22. 408
  23. 536
  24. 520
  25. 528
  26. 292
  27. 304
  28. 424
  29. 344
  30. 512
  31. 128
  32. 148
  33. 328
  34. 520
  35. 296
  36. 136
  37. 344
  38. 128
  39. 304
  40. 240

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