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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 723 · 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. 1.74 × 4 =
  2. 2.24 × 8 =
  3. 3.57 × 4 =
  4. 4.37 × 8 =
  5. 5.99 × 4 =
  6. 6.25 × 4 =
  7. 7.61 × 8 =
  8. 8.70 × 8 =
  9. 9.27 × 8 =
  10. 10.64 × 4 =
  11. 11.44 × 8 =
  12. 12.66 × 8 =
  13. 13.23 × 8 =
  14. 14.159 × 4 =
  15. 15.27 × 8 =
  16. 16.14 × 8 =
  17. 17.12 × 8 =
  18. 18.112 × 4 =
  19. 19.51 × 4 =
  20. 20.16 × 8 =
  21. 21.13 × 4 =
  22. 22.16 × 8 =
  23. 23.69 × 4 =
  24. 24.115 × 4 =
  25. 25.122 × 4 =
  26. 26.68 × 8 =
  27. 27.30 × 8 =
  28. 28.16 × 4 =
  29. 29.128 × 4 =
  30. 30.88 × 4 =
  31. 31.158 × 4 =
  32. 32.63 × 4 =
  33. 33.32 × 8 =
  34. 34.68 × 4 =
  35. 35.139 × 4 =
  36. 36.81 × 4 =
  37. 37.13 × 8 =
  38. 38.120 × 4 =
  39. 39.118 × 4 =
  40. 40.113 × 4 =

Answer key

  1. 296
  2. 192
  3. 228
  4. 296
  5. 396
  6. 100
  7. 488
  8. 560
  9. 216
  10. 256
  11. 352
  12. 528
  13. 184
  14. 636
  15. 216
  16. 112
  17. 96
  18. 448
  19. 204
  20. 128
  21. 52
  22. 128
  23. 276
  24. 460
  25. 488
  26. 544
  27. 240
  28. 64
  29. 512
  30. 352
  31. 632
  32. 252
  33. 256
  34. 272
  35. 556
  36. 324
  37. 104
  38. 480
  39. 472
  40. 452

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