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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 461 · 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. 1.29 × 4 =
  2. 2.115 × 4 =
  3. 3.27 × 4 =
  4. 4.98 × 4 =
  5. 5.144 × 4 =
  6. 6.29 × 8 =
  7. 7.55 × 8 =
  8. 8.23 × 4 =
  9. 9.26 × 8 =
  10. 10.74 × 4 =
  11. 11.59 × 4 =
  12. 12.29 × 8 =
  13. 13.58 × 8 =
  14. 14.29 × 4 =
  15. 15.15 × 8 =
  16. 16.74 × 8 =
  17. 17.41 × 4 =
  18. 18.52 × 8 =
  19. 19.84 × 4 =
  20. 20.31 × 8 =
  21. 21.97 × 4 =
  22. 22.42 × 8 =
  23. 23.44 × 4 =
  24. 24.45 × 4 =
  25. 25.150 × 4 =
  26. 26.119 × 4 =
  27. 27.122 × 4 =
  28. 28.41 × 8 =
  29. 29.30 × 8 =
  30. 30.24 × 4 =
  31. 31.160 × 4 =
  32. 32.68 × 4 =
  33. 33.111 × 4 =
  34. 34.74 × 4 =
  35. 35.159 × 4 =
  36. 36.19 × 8 =
  37. 37.60 × 8 =
  38. 38.67 × 8 =
  39. 39.121 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 116
  2. 460
  3. 108
  4. 392
  5. 576
  6. 232
  7. 440
  8. 92
  9. 208
  10. 296
  11. 236
  12. 232
  13. 464
  14. 116
  15. 120
  16. 592
  17. 164
  18. 416
  19. 336
  20. 248
  21. 388
  22. 336
  23. 176
  24. 180
  25. 600
  26. 476
  27. 488
  28. 328
  29. 240
  30. 96
  31. 640
  32. 272
  33. 444
  34. 296
  35. 636
  36. 152
  37. 480
  38. 536
  39. 484
  40. 120

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