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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 771 · 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. 1.86 × 4 =
  2. 2.25 × 8 =
  3. 3.89 × 4 =
  4. 4.41 × 8 =
  5. 5.84 × 4 =
  6. 6.28 × 8 =
  7. 7.72 × 8 =
  8. 8.37 × 4 =
  9. 9.40 × 4 =
  10. 10.35 × 8 =
  11. 11.99 × 4 =
  12. 12.32 × 8 =
  13. 13.29 × 8 =
  14. 14.51 × 4 =
  15. 15.13 × 4 =
  16. 16.15 × 4 =
  17. 17.34 × 4 =
  18. 18.74 × 8 =
  19. 19.28 × 4 =
  20. 20.121 × 4 =
  21. 21.142 × 4 =
  22. 22.60 × 4 =
  23. 23.22 × 4 =
  24. 24.145 × 4 =
  25. 25.73 × 8 =
  26. 26.100 × 4 =
  27. 27.77 × 4 =
  28. 28.32 × 8 =
  29. 29.74 × 4 =
  30. 30.93 × 4 =
  31. 31.44 × 4 =
  32. 32.55 × 4 =
  33. 33.89 × 4 =
  34. 34.61 × 8 =
  35. 35.73 × 8 =
  36. 36.150 × 4 =
  37. 37.44 × 4 =
  38. 38.24 × 8 =
  39. 39.31 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 344
  2. 200
  3. 356
  4. 328
  5. 336
  6. 224
  7. 576
  8. 148
  9. 160
  10. 280
  11. 396
  12. 256
  13. 232
  14. 204
  15. 52
  16. 60
  17. 136
  18. 592
  19. 112
  20. 484
  21. 568
  22. 240
  23. 88
  24. 580
  25. 584
  26. 400
  27. 308
  28. 256
  29. 296
  30. 372
  31. 176
  32. 220
  33. 356
  34. 488
  35. 584
  36. 600
  37. 176
  38. 192
  39. 248
  40. 104

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