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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 197 · 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. 1.21 × 4 =
  2. 2.66 × 8 =
  3. 3.20 × 8 =
  4. 4.20 × 4 =
  5. 5.88 × 4 =
  6. 6.113 × 4 =
  7. 7.91 × 4 =
  8. 8.68 × 8 =
  9. 9.42 × 8 =
  10. 10.47 × 8 =
  11. 11.125 × 4 =
  12. 12.123 × 4 =
  13. 13.35 × 8 =
  14. 14.87 × 4 =
  15. 15.58 × 8 =
  16. 16.26 × 8 =
  17. 17.51 × 8 =
  18. 18.54 × 8 =
  19. 19.137 × 4 =
  20. 20.31 × 8 =
  21. 21.125 × 4 =
  22. 22.12 × 8 =
  23. 23.75 × 8 =
  24. 24.145 × 4 =
  25. 25.66 × 8 =
  26. 26.131 × 4 =
  27. 27.22 × 4 =
  28. 28.25 × 8 =
  29. 29.119 × 4 =
  30. 30.153 × 4 =
  31. 31.17 × 8 =
  32. 32.68 × 8 =
  33. 33.31 × 8 =
  34. 34.24 × 4 =
  35. 35.129 × 4 =
  36. 36.22 × 8 =
  37. 37.118 × 4 =
  38. 38.127 × 4 =
  39. 39.157 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 84
  2. 528
  3. 160
  4. 80
  5. 352
  6. 452
  7. 364
  8. 544
  9. 336
  10. 376
  11. 500
  12. 492
  13. 280
  14. 348
  15. 464
  16. 208
  17. 408
  18. 432
  19. 548
  20. 248
  21. 500
  22. 96
  23. 600
  24. 580
  25. 528
  26. 524
  27. 88
  28. 200
  29. 476
  30. 612
  31. 136
  32. 544
  33. 248
  34. 96
  35. 516
  36. 176
  37. 472
  38. 508
  39. 628
  40. 360

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