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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 36 · 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. 1.139 × 4 =
  2. 2.20 × 8 =
  3. 3.26 × 8 =
  4. 4.21 × 8 =
  5. 5.43 × 8 =
  6. 6.68 × 8 =
  7. 7.151 × 4 =
  8. 8.13 × 8 =
  9. 9.42 × 8 =
  10. 10.122 × 4 =
  11. 11.71 × 8 =
  12. 12.16 × 4 =
  13. 13.88 × 4 =
  14. 14.82 × 4 =
  15. 15.32 × 4 =
  16. 16.114 × 4 =
  17. 17.77 × 4 =
  18. 18.34 × 8 =
  19. 19.45 × 8 =
  20. 20.35 × 8 =
  21. 21.35 × 8 =
  22. 22.16 × 8 =
  23. 23.148 × 4 =
  24. 24.94 × 4 =
  25. 25.34 × 8 =
  26. 26.38 × 8 =
  27. 27.75 × 8 =
  28. 28.114 × 4 =
  29. 29.32 × 8 =
  30. 30.105 × 4 =
  31. 31.22 × 8 =
  32. 32.18 × 4 =
  33. 33.12 × 8 =
  34. 34.69 × 4 =
  35. 35.72 × 8 =
  36. 36.27 × 8 =
  37. 37.65 × 8 =
  38. 38.67 × 8 =
  39. 39.62 × 8 =
  40. 40.51 × 8 =

Answer key

  1. 556
  2. 160
  3. 208
  4. 168
  5. 344
  6. 544
  7. 604
  8. 104
  9. 336
  10. 488
  11. 568
  12. 64
  13. 352
  14. 328
  15. 128
  16. 456
  17. 308
  18. 272
  19. 360
  20. 280
  21. 280
  22. 128
  23. 592
  24. 376
  25. 272
  26. 304
  27. 600
  28. 456
  29. 256
  30. 420
  31. 176
  32. 72
  33. 96
  34. 276
  35. 576
  36. 216
  37. 520
  38. 536
  39. 496
  40. 408

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