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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 85 · 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. 1.18 × 4 =
  2. 2.120 × 4 =
  3. 3.66 × 8 =
  4. 4.90 × 4 =
  5. 5.74 × 8 =
  6. 6.14 × 8 =
  7. 7.25 × 8 =
  8. 8.68 × 8 =
  9. 9.68 × 4 =
  10. 10.74 × 8 =
  11. 11.15 × 8 =
  12. 12.58 × 8 =
  13. 13.93 × 4 =
  14. 14.158 × 4 =
  15. 15.135 × 4 =
  16. 16.139 × 4 =
  17. 17.43 × 8 =
  18. 18.15 × 8 =
  19. 19.69 × 4 =
  20. 20.115 × 4 =
  21. 21.27 × 4 =
  22. 22.69 × 8 =
  23. 23.45 × 8 =
  24. 24.74 × 8 =
  25. 25.14 × 4 =
  26. 26.58 × 4 =
  27. 27.22 × 8 =
  28. 28.128 × 4 =
  29. 29.34 × 8 =
  30. 30.37 × 4 =
  31. 31.70 × 8 =
  32. 32.84 × 4 =
  33. 33.71 × 8 =
  34. 34.57 × 4 =
  35. 35.16 × 8 =
  36. 36.54 × 8 =
  37. 37.31 × 4 =
  38. 38.48 × 4 =
  39. 39.21 × 8 =
  40. 40.28 × 4 =

Answer key

  1. 72
  2. 480
  3. 528
  4. 360
  5. 592
  6. 112
  7. 200
  8. 544
  9. 272
  10. 592
  11. 120
  12. 464
  13. 372
  14. 632
  15. 540
  16. 556
  17. 344
  18. 120
  19. 276
  20. 460
  21. 108
  22. 552
  23. 360
  24. 592
  25. 56
  26. 232
  27. 176
  28. 512
  29. 272
  30. 148
  31. 560
  32. 336
  33. 568
  34. 228
  35. 128
  36. 432
  37. 124
  38. 192
  39. 168
  40. 112

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