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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 677 · 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. 1.58 × 4 =
  2. 2.75 × 4 =
  3. 3.84 × 4 =
  4. 4.56 × 8 =
  5. 5.76 × 4 =
  6. 6.106 × 4 =
  7. 7.64 × 8 =
  8. 8.56 × 4 =
  9. 9.62 × 4 =
  10. 10.78 × 4 =
  11. 11.63 × 8 =
  12. 12.54 × 4 =
  13. 13.26 × 8 =
  14. 14.23 × 4 =
  15. 15.21 × 8 =
  16. 16.68 × 8 =
  17. 17.68 × 8 =
  18. 18.59 × 4 =
  19. 19.133 × 4 =
  20. 20.67 × 8 =
  21. 21.27 × 4 =
  22. 22.26 × 8 =
  23. 23.30 × 8 =
  24. 24.40 × 4 =
  25. 25.23 × 8 =
  26. 26.61 × 8 =
  27. 27.116 × 4 =
  28. 28.95 × 4 =
  29. 29.157 × 4 =
  30. 30.64 × 8 =
  31. 31.32 × 4 =
  32. 32.14 × 4 =
  33. 33.31 × 8 =
  34. 34.37 × 4 =
  35. 35.132 × 4 =
  36. 36.23 × 4 =
  37. 37.30 × 8 =
  38. 38.69 × 4 =
  39. 39.97 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 232
  2. 300
  3. 336
  4. 448
  5. 304
  6. 424
  7. 512
  8. 224
  9. 248
  10. 312
  11. 504
  12. 216
  13. 208
  14. 92
  15. 168
  16. 544
  17. 544
  18. 236
  19. 532
  20. 536
  21. 108
  22. 208
  23. 240
  24. 160
  25. 184
  26. 488
  27. 464
  28. 380
  29. 628
  30. 512
  31. 128
  32. 56
  33. 248
  34. 148
  35. 528
  36. 92
  37. 240
  38. 276
  39. 388
  40. 200

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