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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 746 · 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. 1.56 × 4 =
  2. 2.17 × 8 =
  3. 3.29 × 4 =
  4. 4.69 × 4 =
  5. 5.82 × 4 =
  6. 6.33 × 8 =
  7. 7.45 × 8 =
  8. 8.58 × 4 =
  9. 9.46 × 4 =
  10. 10.100 × 4 =
  11. 11.29 × 4 =
  12. 12.70 × 8 =
  13. 13.73 × 4 =
  14. 14.53 × 4 =
  15. 15.25 × 8 =
  16. 16.65 × 8 =
  17. 17.136 × 4 =
  18. 18.33 × 8 =
  19. 19.29 × 8 =
  20. 20.85 × 4 =
  21. 21.41 × 8 =
  22. 22.24 × 4 =
  23. 23.141 × 4 =
  24. 24.149 × 4 =
  25. 25.14 × 8 =
  26. 26.43 × 8 =
  27. 27.59 × 4 =
  28. 28.49 × 8 =
  29. 29.53 × 4 =
  30. 30.59 × 4 =
  31. 31.21 × 4 =
  32. 32.35 × 8 =
  33. 33.70 × 8 =
  34. 34.95 × 4 =
  35. 35.54 × 4 =
  36. 36.16 × 8 =
  37. 37.75 × 4 =
  38. 38.45 × 4 =
  39. 39.79 × 4 =
  40. 40.106 × 4 =

Answer key

  1. 224
  2. 136
  3. 116
  4. 276
  5. 328
  6. 264
  7. 360
  8. 232
  9. 184
  10. 400
  11. 116
  12. 560
  13. 292
  14. 212
  15. 200
  16. 520
  17. 544
  18. 264
  19. 232
  20. 340
  21. 328
  22. 96
  23. 564
  24. 596
  25. 112
  26. 344
  27. 236
  28. 392
  29. 212
  30. 236
  31. 84
  32. 280
  33. 560
  34. 380
  35. 216
  36. 128
  37. 300
  38. 180
  39. 316
  40. 424

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