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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 828 · 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. 1.72 × 8 =
  2. 2.61 × 8 =
  3. 3.15 × 4 =
  4. 4.80 × 4 =
  5. 5.70 × 8 =
  6. 6.14 × 8 =
  7. 7.56 × 4 =
  8. 8.36 × 4 =
  9. 9.46 × 4 =
  10. 10.29 × 8 =
  11. 11.105 × 4 =
  12. 12.84 × 4 =
  13. 13.36 × 8 =
  14. 14.114 × 4 =
  15. 15.48 × 8 =
  16. 16.63 × 8 =
  17. 17.123 × 4 =
  18. 18.40 × 8 =
  19. 19.30 × 8 =
  20. 20.49 × 8 =
  21. 21.140 × 4 =
  22. 22.36 × 4 =
  23. 23.31 × 8 =
  24. 24.83 × 4 =
  25. 25.32 × 8 =
  26. 26.29 × 4 =
  27. 27.97 × 4 =
  28. 28.25 × 4 =
  29. 29.15 × 4 =
  30. 30.97 × 4 =
  31. 31.53 × 4 =
  32. 32.97 × 4 =
  33. 33.75 × 8 =
  34. 34.31 × 8 =
  35. 35.154 × 4 =
  36. 36.67 × 8 =
  37. 37.16 × 8 =
  38. 38.30 × 8 =
  39. 39.37 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 576
  2. 488
  3. 60
  4. 320
  5. 560
  6. 112
  7. 224
  8. 144
  9. 184
  10. 232
  11. 420
  12. 336
  13. 288
  14. 456
  15. 384
  16. 504
  17. 492
  18. 320
  19. 240
  20. 392
  21. 560
  22. 144
  23. 248
  24. 332
  25. 256
  26. 116
  27. 388
  28. 100
  29. 60
  30. 388
  31. 212
  32. 388
  33. 600
  34. 248
  35. 616
  36. 536
  37. 128
  38. 240
  39. 296
  40. 296

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