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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 33 · 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. 1.18 × 4 =
  2. 2.56 × 8 =
  3. 3.43 × 4 =
  4. 4.15 × 4 =
  5. 5.32 × 8 =
  6. 6.49 × 8 =
  7. 7.40 × 4 =
  8. 8.113 × 4 =
  9. 9.69 × 8 =
  10. 10.53 × 4 =
  11. 11.52 × 8 =
  12. 12.132 × 4 =
  13. 13.109 × 4 =
  14. 14.43 × 8 =
  15. 15.64 × 8 =
  16. 16.23 × 4 =
  17. 17.73 × 8 =
  18. 18.115 × 4 =
  19. 19.49 × 8 =
  20. 20.73 × 8 =
  21. 21.108 × 4 =
  22. 22.45 × 8 =
  23. 23.75 × 4 =
  24. 24.41 × 8 =
  25. 25.95 × 4 =
  26. 26.15 × 4 =
  27. 27.42 × 4 =
  28. 28.117 × 4 =
  29. 29.16 × 8 =
  30. 30.34 × 8 =
  31. 31.95 × 4 =
  32. 32.74 × 8 =
  33. 33.14 × 4 =
  34. 34.133 × 4 =
  35. 35.28 × 4 =
  36. 36.72 × 4 =
  37. 37.110 × 4 =
  38. 38.78 × 4 =
  39. 39.47 × 8 =
  40. 40.15 × 8 =

Answer key

  1. 72
  2. 448
  3. 172
  4. 60
  5. 256
  6. 392
  7. 160
  8. 452
  9. 552
  10. 212
  11. 416
  12. 528
  13. 436
  14. 344
  15. 512
  16. 92
  17. 584
  18. 460
  19. 392
  20. 584
  21. 432
  22. 360
  23. 300
  24. 328
  25. 380
  26. 60
  27. 168
  28. 468
  29. 128
  30. 272
  31. 380
  32. 592
  33. 56
  34. 532
  35. 112
  36. 288
  37. 440
  38. 312
  39. 376
  40. 120

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