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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 995 · 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. 1.69 × 8 =
  2. 2.79 × 4 =
  3. 3.106 × 4 =
  4. 4.123 × 4 =
  5. 5.23 × 8 =
  6. 6.14 × 4 =
  7. 7.13 × 8 =
  8. 8.157 × 4 =
  9. 9.103 × 4 =
  10. 10.44 × 8 =
  11. 11.52 × 8 =
  12. 12.48 × 8 =
  13. 13.59 × 8 =
  14. 14.71 × 4 =
  15. 15.28 × 4 =
  16. 16.51 × 4 =
  17. 17.75 × 4 =
  18. 18.81 × 4 =
  19. 19.34 × 8 =
  20. 20.54 × 4 =
  21. 21.63 × 8 =
  22. 22.22 × 8 =
  23. 23.106 × 4 =
  24. 24.27 × 8 =
  25. 25.66 × 8 =
  26. 26.116 × 4 =
  27. 27.20 × 8 =
  28. 28.68 × 8 =
  29. 29.68 × 8 =
  30. 30.117 × 4 =
  31. 31.38 × 4 =
  32. 32.38 × 8 =
  33. 33.40 × 8 =
  34. 34.35 × 8 =
  35. 35.20 × 8 =
  36. 36.32 × 8 =
  37. 37.63 × 4 =
  38. 38.74 × 8 =
  39. 39.41 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 552
  2. 316
  3. 424
  4. 492
  5. 184
  6. 56
  7. 104
  8. 628
  9. 412
  10. 352
  11. 416
  12. 384
  13. 472
  14. 284
  15. 112
  16. 204
  17. 300
  18. 324
  19. 272
  20. 216
  21. 504
  22. 176
  23. 424
  24. 216
  25. 528
  26. 464
  27. 160
  28. 544
  29. 544
  30. 468
  31. 152
  32. 304
  33. 320
  34. 280
  35. 160
  36. 256
  37. 252
  38. 592
  39. 164
  40. 92

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