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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 290 · 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. 1.133 × 4 =
  2. 2.19 × 4 =
  3. 3.29 × 8 =
  4. 4.34 × 4 =
  5. 5.53 × 4 =
  6. 6.47 × 8 =
  7. 7.23 × 4 =
  8. 8.154 × 4 =
  9. 9.21 × 8 =
  10. 10.17 × 8 =
  11. 11.155 × 4 =
  12. 12.141 × 4 =
  13. 13.38 × 4 =
  14. 14.64 × 4 =
  15. 15.13 × 8 =
  16. 16.68 × 4 =
  17. 17.128 × 4 =
  18. 18.18 × 4 =
  19. 19.47 × 8 =
  20. 20.55 × 4 =
  21. 21.65 × 8 =
  22. 22.71 × 8 =
  23. 23.25 × 8 =
  24. 24.32 × 8 =
  25. 25.46 × 8 =
  26. 26.93 × 4 =
  27. 27.71 × 8 =
  28. 28.125 × 4 =
  29. 29.17 × 4 =
  30. 30.56 × 8 =
  31. 31.58 × 8 =
  32. 32.132 × 4 =
  33. 33.21 × 8 =
  34. 34.85 × 4 =
  35. 35.58 × 8 =
  36. 36.27 × 8 =
  37. 37.40 × 4 =
  38. 38.77 × 4 =
  39. 39.44 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 532
  2. 76
  3. 232
  4. 136
  5. 212
  6. 376
  7. 92
  8. 616
  9. 168
  10. 136
  11. 620
  12. 564
  13. 152
  14. 256
  15. 104
  16. 272
  17. 512
  18. 72
  19. 376
  20. 220
  21. 520
  22. 568
  23. 200
  24. 256
  25. 368
  26. 372
  27. 568
  28. 500
  29. 68
  30. 448
  31. 464
  32. 528
  33. 168
  34. 340
  35. 464
  36. 216
  37. 160
  38. 308
  39. 352
  40. 160

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