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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 50 · 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. 1.12 × 8 =
  2. 2.17 × 8 =
  3. 3.29 × 8 =
  4. 4.72 × 4 =
  5. 5.47 × 4 =
  6. 6.160 × 4 =
  7. 7.94 × 4 =
  8. 8.39 × 8 =
  9. 9.59 × 4 =
  10. 10.33 × 8 =
  11. 11.31 × 8 =
  12. 12.123 × 4 =
  13. 13.73 × 8 =
  14. 14.17 × 8 =
  15. 15.27 × 4 =
  16. 16.18 × 8 =
  17. 17.61 × 8 =
  18. 18.126 × 4 =
  19. 19.50 × 8 =
  20. 20.28 × 4 =
  21. 21.55 × 4 =
  22. 22.41 × 8 =
  23. 23.40 × 8 =
  24. 24.53 × 4 =
  25. 25.33 × 4 =
  26. 26.110 × 4 =
  27. 27.139 × 4 =
  28. 28.34 × 8 =
  29. 29.39 × 8 =
  30. 30.51 × 8 =
  31. 31.83 × 4 =
  32. 32.31 × 8 =
  33. 33.141 × 4 =
  34. 34.102 × 4 =
  35. 35.159 × 4 =
  36. 36.142 × 4 =
  37. 37.62 × 8 =
  38. 38.34 × 4 =
  39. 39.47 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 96
  2. 136
  3. 232
  4. 288
  5. 188
  6. 640
  7. 376
  8. 312
  9. 236
  10. 264
  11. 248
  12. 492
  13. 584
  14. 136
  15. 108
  16. 144
  17. 488
  18. 504
  19. 400
  20. 112
  21. 220
  22. 328
  23. 320
  24. 212
  25. 132
  26. 440
  27. 556
  28. 272
  29. 312
  30. 408
  31. 332
  32. 248
  33. 564
  34. 408
  35. 636
  36. 568
  37. 496
  38. 136
  39. 376
  40. 144

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