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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 568 · 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. 1.40 × 8 =
  2. 2.47 × 8 =
  3. 3.34 × 8 =
  4. 4.53 × 4 =
  5. 5.26 × 4 =
  6. 6.97 × 4 =
  7. 7.109 × 4 =
  8. 8.132 × 4 =
  9. 9.62 × 8 =
  10. 10.82 × 4 =
  11. 11.23 × 8 =
  12. 12.66 × 8 =
  13. 13.146 × 4 =
  14. 14.18 × 4 =
  15. 15.111 × 4 =
  16. 16.49 × 4 =
  17. 17.111 × 4 =
  18. 18.49 × 8 =
  19. 19.88 × 4 =
  20. 20.51 × 8 =
  21. 21.36 × 8 =
  22. 22.104 × 4 =
  23. 23.66 × 8 =
  24. 24.91 × 4 =
  25. 25.61 × 8 =
  26. 26.91 × 4 =
  27. 27.155 × 4 =
  28. 28.14 × 4 =
  29. 29.45 × 8 =
  30. 30.111 × 4 =
  31. 31.95 × 4 =
  32. 32.31 × 8 =
  33. 33.156 × 4 =
  34. 34.30 × 4 =
  35. 35.47 × 4 =
  36. 36.18 × 8 =
  37. 37.59 × 8 =
  38. 38.13 × 8 =
  39. 39.103 × 4 =
  40. 40.71 × 8 =

Answer key

  1. 320
  2. 376
  3. 272
  4. 212
  5. 104
  6. 388
  7. 436
  8. 528
  9. 496
  10. 328
  11. 184
  12. 528
  13. 584
  14. 72
  15. 444
  16. 196
  17. 444
  18. 392
  19. 352
  20. 408
  21. 288
  22. 416
  23. 528
  24. 364
  25. 488
  26. 364
  27. 620
  28. 56
  29. 360
  30. 444
  31. 380
  32. 248
  33. 624
  34. 120
  35. 188
  36. 144
  37. 472
  38. 104
  39. 412
  40. 568

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