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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 884 · 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. 1.38 × 8 =
  2. 2.36 × 4 =
  3. 3.24 × 8 =
  4. 4.79 × 4 =
  5. 5.61 × 8 =
  6. 6.53 × 8 =
  7. 7.109 × 4 =
  8. 8.22 × 8 =
  9. 9.102 × 4 =
  10. 10.15 × 8 =
  11. 11.103 × 4 =
  12. 12.49 × 8 =
  13. 13.150 × 4 =
  14. 14.86 × 4 =
  15. 15.29 × 8 =
  16. 16.53 × 4 =
  17. 17.38 × 4 =
  18. 18.58 × 4 =
  19. 19.120 × 4 =
  20. 20.157 × 4 =
  21. 21.40 × 8 =
  22. 22.86 × 4 =
  23. 23.28 × 4 =
  24. 24.100 × 4 =
  25. 25.76 × 4 =
  26. 26.39 × 4 =
  27. 27.17 × 8 =
  28. 28.68 × 4 =
  29. 29.69 × 8 =
  30. 30.83 × 4 =
  31. 31.142 × 4 =
  32. 32.33 × 4 =
  33. 33.49 × 4 =
  34. 34.52 × 8 =
  35. 35.40 × 8 =
  36. 36.28 × 4 =
  37. 37.44 × 8 =
  38. 38.124 × 4 =
  39. 39.142 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 304
  2. 144
  3. 192
  4. 316
  5. 488
  6. 424
  7. 436
  8. 176
  9. 408
  10. 120
  11. 412
  12. 392
  13. 600
  14. 344
  15. 232
  16. 212
  17. 152
  18. 232
  19. 480
  20. 628
  21. 320
  22. 344
  23. 112
  24. 400
  25. 304
  26. 156
  27. 136
  28. 272
  29. 552
  30. 332
  31. 568
  32. 132
  33. 196
  34. 416
  35. 320
  36. 112
  37. 352
  38. 496
  39. 568
  40. 96

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