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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 611 · 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 × 8 =
  2. 2.58 × 4 =
  3. 3.119 × 4 =
  4. 4.127 × 4 =
  5. 5.34 × 8 =
  6. 6.59 × 8 =
  7. 7.44 × 8 =
  8. 8.22 × 4 =
  9. 9.98 × 4 =
  10. 10.74 × 8 =
  11. 11.53 × 8 =
  12. 12.40 × 4 =
  13. 13.74 × 8 =
  14. 14.31 × 8 =
  15. 15.40 × 4 =
  16. 16.47 × 4 =
  17. 17.13 × 8 =
  18. 18.32 × 8 =
  19. 19.59 × 8 =
  20. 20.19 × 8 =
  21. 21.127 × 4 =
  22. 22.112 × 4 =
  23. 23.43 × 8 =
  24. 24.41 × 8 =
  25. 25.41 × 8 =
  26. 26.33 × 8 =
  27. 27.21 × 4 =
  28. 28.46 × 8 =
  29. 29.61 × 8 =
  30. 30.23 × 8 =
  31. 31.44 × 8 =
  32. 32.131 × 4 =
  33. 33.38 × 4 =
  34. 34.30 × 4 =
  35. 35.150 × 4 =
  36. 36.30 × 8 =
  37. 37.19 × 8 =
  38. 38.54 × 8 =
  39. 39.31 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 232
  2. 232
  3. 476
  4. 508
  5. 272
  6. 472
  7. 352
  8. 88
  9. 392
  10. 592
  11. 424
  12. 160
  13. 592
  14. 248
  15. 160
  16. 188
  17. 104
  18. 256
  19. 472
  20. 152
  21. 508
  22. 448
  23. 344
  24. 328
  25. 328
  26. 264
  27. 84
  28. 368
  29. 488
  30. 184
  31. 352
  32. 524
  33. 152
  34. 120
  35. 600
  36. 240
  37. 152
  38. 432
  39. 124
  40. 220

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