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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 721 · 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. 1.151 × 4 =
  2. 2.30 × 8 =
  3. 3.91 × 4 =
  4. 4.139 × 4 =
  5. 5.16 × 8 =
  6. 6.41 × 8 =
  7. 7.68 × 4 =
  8. 8.58 × 8 =
  9. 9.63 × 4 =
  10. 10.13 × 4 =
  11. 11.109 × 4 =
  12. 12.22 × 8 =
  13. 13.12 × 8 =
  14. 14.109 × 4 =
  15. 15.101 × 4 =
  16. 16.20 × 8 =
  17. 17.23 × 8 =
  18. 18.18 × 4 =
  19. 19.49 × 4 =
  20. 20.13 × 4 =
  21. 21.22 × 4 =
  22. 22.18 × 8 =
  23. 23.37 × 4 =
  24. 24.47 × 8 =
  25. 25.30 × 8 =
  26. 26.146 × 4 =
  27. 27.16 × 4 =
  28. 28.100 × 4 =
  29. 29.55 × 8 =
  30. 30.34 × 8 =
  31. 31.16 × 8 =
  32. 32.56 × 4 =
  33. 33.18 × 4 =
  34. 34.32 × 4 =
  35. 35.32 × 4 =
  36. 36.36 × 8 =
  37. 37.52 × 4 =
  38. 38.44 × 4 =
  39. 39.12 × 8 =
  40. 40.156 × 4 =

Answer key

  1. 604
  2. 240
  3. 364
  4. 556
  5. 128
  6. 328
  7. 272
  8. 464
  9. 252
  10. 52
  11. 436
  12. 176
  13. 96
  14. 436
  15. 404
  16. 160
  17. 184
  18. 72
  19. 196
  20. 52
  21. 88
  22. 144
  23. 148
  24. 376
  25. 240
  26. 584
  27. 64
  28. 400
  29. 440
  30. 272
  31. 128
  32. 224
  33. 72
  34. 128
  35. 128
  36. 288
  37. 208
  38. 176
  39. 96
  40. 624

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