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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 536 · 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. 1.109 × 4 =
  2. 2.31 × 4 =
  3. 3.111 × 4 =
  4. 4.27 × 8 =
  5. 5.91 × 4 =
  6. 6.30 × 8 =
  7. 7.61 × 8 =
  8. 8.37 × 4 =
  9. 9.105 × 4 =
  10. 10.130 × 4 =
  11. 11.54 × 8 =
  12. 12.101 × 4 =
  13. 13.19 × 4 =
  14. 14.141 × 4 =
  15. 15.42 × 8 =
  16. 16.13 × 8 =
  17. 17.72 × 8 =
  18. 18.33 × 4 =
  19. 19.52 × 8 =
  20. 20.13 × 8 =
  21. 21.73 × 8 =
  22. 22.13 × 4 =
  23. 23.20 × 8 =
  24. 24.17 × 4 =
  25. 25.35 × 8 =
  26. 26.115 × 4 =
  27. 27.54 × 4 =
  28. 28.155 × 4 =
  29. 29.46 × 8 =
  30. 30.52 × 8 =
  31. 31.24 × 8 =
  32. 32.146 × 4 =
  33. 33.63 × 4 =
  34. 34.19 × 4 =
  35. 35.37 × 4 =
  36. 36.26 × 8 =
  37. 37.57 × 4 =
  38. 38.137 × 4 =
  39. 39.36 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 436
  2. 124
  3. 444
  4. 216
  5. 364
  6. 240
  7. 488
  8. 148
  9. 420
  10. 520
  11. 432
  12. 404
  13. 76
  14. 564
  15. 336
  16. 104
  17. 576
  18. 132
  19. 416
  20. 104
  21. 584
  22. 52
  23. 160
  24. 68
  25. 280
  26. 460
  27. 216
  28. 620
  29. 368
  30. 416
  31. 192
  32. 584
  33. 252
  34. 76
  35. 148
  36. 208
  37. 228
  38. 548
  39. 144
  40. 232

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