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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 240 · 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. 1.30 × 8 =
  2. 2.14 × 4 =
  3. 3.41 × 8 =
  4. 4.108 × 4 =
  5. 5.74 × 4 =
  6. 6.13 × 4 =
  7. 7.139 × 4 =
  8. 8.151 × 4 =
  9. 9.23 × 8 =
  10. 10.33 × 8 =
  11. 11.99 × 4 =
  12. 12.44 × 8 =
  13. 13.52 × 8 =
  14. 14.152 × 4 =
  15. 15.28 × 8 =
  16. 16.23 × 8 =
  17. 17.26 × 8 =
  18. 18.16 × 8 =
  19. 19.61 × 4 =
  20. 20.68 × 4 =
  21. 21.16 × 8 =
  22. 22.90 × 4 =
  23. 23.53 × 8 =
  24. 24.39 × 4 =
  25. 25.74 × 8 =
  26. 26.59 × 8 =
  27. 27.48 × 8 =
  28. 28.123 × 4 =
  29. 29.91 × 4 =
  30. 30.109 × 4 =
  31. 31.27 × 8 =
  32. 32.14 × 8 =
  33. 33.20 × 4 =
  34. 34.33 × 4 =
  35. 35.120 × 4 =
  36. 36.90 × 4 =
  37. 37.87 × 4 =
  38. 38.67 × 4 =
  39. 39.13 × 8 =
  40. 40.16 × 4 =

Answer key

  1. 240
  2. 56
  3. 328
  4. 432
  5. 296
  6. 52
  7. 556
  8. 604
  9. 184
  10. 264
  11. 396
  12. 352
  13. 416
  14. 608
  15. 224
  16. 184
  17. 208
  18. 128
  19. 244
  20. 272
  21. 128
  22. 360
  23. 424
  24. 156
  25. 592
  26. 472
  27. 384
  28. 492
  29. 364
  30. 436
  31. 216
  32. 112
  33. 80
  34. 132
  35. 480
  36. 360
  37. 348
  38. 268
  39. 104
  40. 64

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