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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 394 · 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. 2.74 × 4 =
  3. 3.18 × 8 =
  4. 4.54 × 4 =
  5. 5.75 × 8 =
  6. 6.64 × 8 =
  7. 7.122 × 4 =
  8. 8.42 × 4 =
  9. 9.61 × 4 =
  10. 10.88 × 4 =
  11. 11.49 × 8 =
  12. 12.22 × 8 =
  13. 13.91 × 4 =
  14. 14.116 × 4 =
  15. 15.37 × 8 =
  16. 16.61 × 8 =
  17. 17.66 × 8 =
  18. 18.33 × 4 =
  19. 19.75 × 4 =
  20. 20.96 × 4 =
  21. 21.16 × 8 =
  22. 22.45 × 8 =
  23. 23.12 × 8 =
  24. 24.15 × 8 =
  25. 25.13 × 8 =
  26. 26.126 × 4 =
  27. 27.25 × 8 =
  28. 28.21 × 4 =
  29. 29.38 × 8 =
  30. 30.20 × 8 =
  31. 31.156 × 4 =
  32. 32.23 × 8 =
  33. 33.24 × 8 =
  34. 34.23 × 8 =
  35. 35.47 × 4 =
  36. 36.15 × 4 =
  37. 37.114 × 4 =
  38. 38.75 × 4 =
  39. 39.151 × 4 =
  40. 40.76 × 4 =

Answer key

  1. 116
  2. 296
  3. 144
  4. 216
  5. 600
  6. 512
  7. 488
  8. 168
  9. 244
  10. 352
  11. 392
  12. 176
  13. 364
  14. 464
  15. 296
  16. 488
  17. 528
  18. 132
  19. 300
  20. 384
  21. 128
  22. 360
  23. 96
  24. 120
  25. 104
  26. 504
  27. 200
  28. 84
  29. 304
  30. 160
  31. 624
  32. 184
  33. 192
  34. 184
  35. 188
  36. 60
  37. 456
  38. 300
  39. 604
  40. 304

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