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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 683 · 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. 1.65 × 4 =
  2. 2.29 × 4 =
  3. 3.31 × 8 =
  4. 4.46 × 8 =
  5. 5.32 × 8 =
  6. 6.15 × 4 =
  7. 7.17 × 4 =
  8. 8.13 × 4 =
  9. 9.75 × 8 =
  10. 10.47 × 8 =
  11. 11.43 × 4 =
  12. 12.70 × 4 =
  13. 13.88 × 4 =
  14. 14.78 × 4 =
  15. 15.106 × 4 =
  16. 16.34 × 8 =
  17. 17.110 × 4 =
  18. 18.140 × 4 =
  19. 19.52 × 8 =
  20. 20.50 × 8 =
  21. 21.27 × 8 =
  22. 22.25 × 8 =
  23. 23.13 × 4 =
  24. 24.68 × 8 =
  25. 25.22 × 8 =
  26. 26.78 × 4 =
  27. 27.64 × 8 =
  28. 28.73 × 4 =
  29. 29.60 × 4 =
  30. 30.71 × 8 =
  31. 31.93 × 4 =
  32. 32.37 × 4 =
  33. 33.126 × 4 =
  34. 34.65 × 8 =
  35. 35.67 × 8 =
  36. 36.77 × 4 =
  37. 37.144 × 4 =
  38. 38.20 × 4 =
  39. 39.30 × 4 =
  40. 40.47 × 8 =

Answer key

  1. 260
  2. 116
  3. 248
  4. 368
  5. 256
  6. 60
  7. 68
  8. 52
  9. 600
  10. 376
  11. 172
  12. 280
  13. 352
  14. 312
  15. 424
  16. 272
  17. 440
  18. 560
  19. 416
  20. 400
  21. 216
  22. 200
  23. 52
  24. 544
  25. 176
  26. 312
  27. 512
  28. 292
  29. 240
  30. 568
  31. 372
  32. 148
  33. 504
  34. 520
  35. 536
  36. 308
  37. 576
  38. 80
  39. 120
  40. 376

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