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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 606 · 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. 1.94 × 4 =
  2. 2.65 × 8 =
  3. 3.23 × 4 =
  4. 4.26 × 8 =
  5. 5.30 × 8 =
  6. 6.156 × 4 =
  7. 7.60 × 8 =
  8. 8.31 × 8 =
  9. 9.60 × 4 =
  10. 10.70 × 8 =
  11. 11.133 × 4 =
  12. 12.26 × 4 =
  13. 13.62 × 8 =
  14. 14.47 × 8 =
  15. 15.151 × 4 =
  16. 16.123 × 4 =
  17. 17.84 × 4 =
  18. 18.23 × 8 =
  19. 19.20 × 8 =
  20. 20.15 × 4 =
  21. 21.38 × 8 =
  22. 22.154 × 4 =
  23. 23.157 × 4 =
  24. 24.62 × 8 =
  25. 25.159 × 4 =
  26. 26.125 × 4 =
  27. 27.27 × 4 =
  28. 28.65 × 4 =
  29. 29.139 × 4 =
  30. 30.62 × 4 =
  31. 31.99 × 4 =
  32. 32.14 × 4 =
  33. 33.48 × 8 =
  34. 34.41 × 4 =
  35. 35.24 × 8 =
  36. 36.68 × 8 =
  37. 37.141 × 4 =
  38. 38.20 × 8 =
  39. 39.38 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 376
  2. 520
  3. 92
  4. 208
  5. 240
  6. 624
  7. 480
  8. 248
  9. 240
  10. 560
  11. 532
  12. 104
  13. 496
  14. 376
  15. 604
  16. 492
  17. 336
  18. 184
  19. 160
  20. 60
  21. 304
  22. 616
  23. 628
  24. 496
  25. 636
  26. 500
  27. 108
  28. 260
  29. 556
  30. 248
  31. 396
  32. 56
  33. 384
  34. 164
  35. 192
  36. 544
  37. 564
  38. 160
  39. 304
  40. 208

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