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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 969 · 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. 1.116 × 4 =
  2. 2.55 × 4 =
  3. 3.134 × 4 =
  4. 4.57 × 8 =
  5. 5.56 × 4 =
  6. 6.130 × 4 =
  7. 7.74 × 8 =
  8. 8.66 × 4 =
  9. 9.22 × 8 =
  10. 10.65 × 8 =
  11. 11.61 × 8 =
  12. 12.97 × 4 =
  13. 13.151 × 4 =
  14. 14.86 × 4 =
  15. 15.15 × 4 =
  16. 16.14 × 8 =
  17. 17.33 × 8 =
  18. 18.22 × 8 =
  19. 19.68 × 8 =
  20. 20.99 × 4 =
  21. 21.73 × 8 =
  22. 22.77 × 4 =
  23. 23.118 × 4 =
  24. 24.99 × 4 =
  25. 25.69 × 8 =
  26. 26.14 × 8 =
  27. 27.25 × 8 =
  28. 28.153 × 4 =
  29. 29.41 × 8 =
  30. 30.29 × 8 =
  31. 31.14 × 8 =
  32. 32.45 × 8 =
  33. 33.132 × 4 =
  34. 34.104 × 4 =
  35. 35.80 × 4 =
  36. 36.43 × 8 =
  37. 37.63 × 4 =
  38. 38.125 × 4 =
  39. 39.68 × 4 =
  40. 40.27 × 8 =

Answer key

  1. 464
  2. 220
  3. 536
  4. 456
  5. 224
  6. 520
  7. 592
  8. 264
  9. 176
  10. 520
  11. 488
  12. 388
  13. 604
  14. 344
  15. 60
  16. 112
  17. 264
  18. 176
  19. 544
  20. 396
  21. 584
  22. 308
  23. 472
  24. 396
  25. 552
  26. 112
  27. 200
  28. 612
  29. 328
  30. 232
  31. 112
  32. 360
  33. 528
  34. 416
  35. 320
  36. 344
  37. 252
  38. 500
  39. 272
  40. 216

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