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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 893 · 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. 1.51 × 8 =
  2. 2.66 × 8 =
  3. 3.93 × 4 =
  4. 4.49 × 8 =
  5. 5.46 × 8 =
  6. 6.56 × 8 =
  7. 7.48 × 4 =
  8. 8.22 × 4 =
  9. 9.28 × 4 =
  10. 10.14 × 4 =
  11. 11.57 × 4 =
  12. 12.20 × 4 =
  13. 13.65 × 8 =
  14. 14.120 × 4 =
  15. 15.33 × 4 =
  16. 16.24 × 4 =
  17. 17.132 × 4 =
  18. 18.38 × 8 =
  19. 19.82 × 4 =
  20. 20.29 × 8 =
  21. 21.71 × 4 =
  22. 22.37 × 8 =
  23. 23.135 × 4 =
  24. 24.44 × 8 =
  25. 25.46 × 4 =
  26. 26.22 × 8 =
  27. 27.56 × 4 =
  28. 28.112 × 4 =
  29. 29.110 × 4 =
  30. 30.15 × 8 =
  31. 31.142 × 4 =
  32. 32.150 × 4 =
  33. 33.41 × 4 =
  34. 34.36 × 8 =
  35. 35.37 × 8 =
  36. 36.105 × 4 =
  37. 37.54 × 4 =
  38. 38.84 × 4 =
  39. 39.16 × 8 =
  40. 40.64 × 8 =

Answer key

  1. 408
  2. 528
  3. 372
  4. 392
  5. 368
  6. 448
  7. 192
  8. 88
  9. 112
  10. 56
  11. 228
  12. 80
  13. 520
  14. 480
  15. 132
  16. 96
  17. 528
  18. 304
  19. 328
  20. 232
  21. 284
  22. 296
  23. 540
  24. 352
  25. 184
  26. 176
  27. 224
  28. 448
  29. 440
  30. 120
  31. 568
  32. 600
  33. 164
  34. 288
  35. 296
  36. 420
  37. 216
  38. 336
  39. 128
  40. 512

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