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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 975 · 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. 1.56 × 4 =
  2. 2.23 × 8 =
  3. 3.52 × 8 =
  4. 4.101 × 4 =
  5. 5.41 × 8 =
  6. 6.24 × 8 =
  7. 7.56 × 8 =
  8. 8.22 × 8 =
  9. 9.51 × 8 =
  10. 10.65 × 4 =
  11. 11.36 × 8 =
  12. 12.21 × 4 =
  13. 13.43 × 8 =
  14. 14.147 × 4 =
  15. 15.40 × 8 =
  16. 16.95 × 4 =
  17. 17.44 × 8 =
  18. 18.101 × 4 =
  19. 19.52 × 4 =
  20. 20.96 × 4 =
  21. 21.86 × 4 =
  22. 22.73 × 8 =
  23. 23.80 × 4 =
  24. 24.54 × 8 =
  25. 25.66 × 8 =
  26. 26.107 × 4 =
  27. 27.36 × 8 =
  28. 28.50 × 8 =
  29. 29.19 × 4 =
  30. 30.69 × 4 =
  31. 31.74 × 8 =
  32. 32.25 × 4 =
  33. 33.53 × 8 =
  34. 34.40 × 4 =
  35. 35.15 × 8 =
  36. 36.51 × 4 =
  37. 37.36 × 4 =
  38. 38.18 × 4 =
  39. 39.68 × 8 =
  40. 40.61 × 8 =

Answer key

  1. 224
  2. 184
  3. 416
  4. 404
  5. 328
  6. 192
  7. 448
  8. 176
  9. 408
  10. 260
  11. 288
  12. 84
  13. 344
  14. 588
  15. 320
  16. 380
  17. 352
  18. 404
  19. 208
  20. 384
  21. 344
  22. 584
  23. 320
  24. 432
  25. 528
  26. 428
  27. 288
  28. 400
  29. 76
  30. 276
  31. 592
  32. 100
  33. 424
  34. 160
  35. 120
  36. 204
  37. 144
  38. 72
  39. 544
  40. 488

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