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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 442 · 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. 1.41 × 8 =
  2. 2.20 × 8 =
  3. 3.51 × 8 =
  4. 4.31 × 4 =
  5. 5.101 × 4 =
  6. 6.26 × 8 =
  7. 7.103 × 4 =
  8. 8.77 × 4 =
  9. 9.21 × 8 =
  10. 10.30 × 8 =
  11. 11.29 × 8 =
  12. 12.28 × 8 =
  13. 13.145 × 4 =
  14. 14.24 × 8 =
  15. 15.78 × 4 =
  16. 16.28 × 8 =
  17. 17.73 × 8 =
  18. 18.114 × 4 =
  19. 19.42 × 8 =
  20. 20.48 × 8 =
  21. 21.75 × 8 =
  22. 22.93 × 4 =
  23. 23.49 × 8 =
  24. 24.38 × 4 =
  25. 25.86 × 4 =
  26. 26.65 × 4 =
  27. 27.40 × 8 =
  28. 28.49 × 8 =
  29. 29.48 × 4 =
  30. 30.86 × 4 =
  31. 31.15 × 4 =
  32. 32.32 × 8 =
  33. 33.71 × 8 =
  34. 34.95 × 4 =
  35. 35.151 × 4 =
  36. 36.44 × 8 =
  37. 37.123 × 4 =
  38. 38.50 × 8 =
  39. 39.27 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 328
  2. 160
  3. 408
  4. 124
  5. 404
  6. 208
  7. 412
  8. 308
  9. 168
  10. 240
  11. 232
  12. 224
  13. 580
  14. 192
  15. 312
  16. 224
  17. 584
  18. 456
  19. 336
  20. 384
  21. 600
  22. 372
  23. 392
  24. 152
  25. 344
  26. 260
  27. 320
  28. 392
  29. 192
  30. 344
  31. 60
  32. 256
  33. 568
  34. 380
  35. 604
  36. 352
  37. 492
  38. 400
  39. 216
  40. 160

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