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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 242 · 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. 1.26 × 4 =
  2. 2.141 × 4 =
  3. 3.77 × 4 =
  4. 4.29 × 8 =
  5. 5.69 × 4 =
  6. 6.46 × 8 =
  7. 7.88 × 4 =
  8. 8.22 × 4 =
  9. 9.104 × 4 =
  10. 10.75 × 8 =
  11. 11.131 × 4 =
  12. 12.151 × 4 =
  13. 13.68 × 4 =
  14. 14.104 × 4 =
  15. 15.36 × 8 =
  16. 16.34 × 4 =
  17. 17.100 × 4 =
  18. 18.64 × 8 =
  19. 19.43 × 4 =
  20. 20.68 × 8 =
  21. 21.58 × 8 =
  22. 22.68 × 8 =
  23. 23.80 × 4 =
  24. 24.144 × 4 =
  25. 25.133 × 4 =
  26. 26.57 × 4 =
  27. 27.55 × 4 =
  28. 28.18 × 4 =
  29. 29.28 × 8 =
  30. 30.136 × 4 =
  31. 31.38 × 8 =
  32. 32.71 × 4 =
  33. 33.80 × 4 =
  34. 34.29 × 8 =
  35. 35.13 × 8 =
  36. 36.61 × 8 =
  37. 37.72 × 8 =
  38. 38.62 × 4 =
  39. 39.39 × 4 =
  40. 40.47 × 8 =

Answer key

  1. 104
  2. 564
  3. 308
  4. 232
  5. 276
  6. 368
  7. 352
  8. 88
  9. 416
  10. 600
  11. 524
  12. 604
  13. 272
  14. 416
  15. 288
  16. 136
  17. 400
  18. 512
  19. 172
  20. 544
  21. 464
  22. 544
  23. 320
  24. 576
  25. 532
  26. 228
  27. 220
  28. 72
  29. 224
  30. 544
  31. 304
  32. 284
  33. 320
  34. 232
  35. 104
  36. 488
  37. 576
  38. 248
  39. 156
  40. 376

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