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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 644 · 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. 1.87 × 4 =
  2. 2.65 × 8 =
  3. 3.48 × 8 =
  4. 4.128 × 4 =
  5. 5.61 × 8 =
  6. 6.29 × 8 =
  7. 7.154 × 4 =
  8. 8.15 × 8 =
  9. 9.63 × 4 =
  10. 10.43 × 8 =
  11. 11.52 × 8 =
  12. 12.80 × 4 =
  13. 13.19 × 8 =
  14. 14.27 × 8 =
  15. 15.90 × 4 =
  16. 16.78 × 4 =
  17. 17.41 × 4 =
  18. 18.25 × 4 =
  19. 19.72 × 8 =
  20. 20.15 × 8 =
  21. 21.101 × 4 =
  22. 22.31 × 8 =
  23. 23.41 × 8 =
  24. 24.20 × 8 =
  25. 25.141 × 4 =
  26. 26.22 × 4 =
  27. 27.160 × 4 =
  28. 28.127 × 4 =
  29. 29.24 × 4 =
  30. 30.49 × 4 =
  31. 31.47 × 8 =
  32. 32.79 × 4 =
  33. 33.52 × 8 =
  34. 34.30 × 8 =
  35. 35.28 × 4 =
  36. 36.25 × 8 =
  37. 37.50 × 4 =
  38. 38.46 × 4 =
  39. 39.132 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 348
  2. 520
  3. 384
  4. 512
  5. 488
  6. 232
  7. 616
  8. 120
  9. 252
  10. 344
  11. 416
  12. 320
  13. 152
  14. 216
  15. 360
  16. 312
  17. 164
  18. 100
  19. 576
  20. 120
  21. 404
  22. 248
  23. 328
  24. 160
  25. 564
  26. 88
  27. 640
  28. 508
  29. 96
  30. 196
  31. 376
  32. 316
  33. 416
  34. 240
  35. 112
  36. 200
  37. 200
  38. 184
  39. 528
  40. 440

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