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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 22 · 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. 1.134 × 4 =
  2. 2.127 × 4 =
  3. 3.16 × 8 =
  4. 4.15 × 8 =
  5. 5.15 × 4 =
  6. 6.72 × 8 =
  7. 7.14 × 8 =
  8. 8.17 × 8 =
  9. 9.33 × 8 =
  10. 10.25 × 4 =
  11. 11.44 × 4 =
  12. 12.68 × 8 =
  13. 13.15 × 8 =
  14. 14.44 × 4 =
  15. 15.55 × 8 =
  16. 16.66 × 4 =
  17. 17.19 × 8 =
  18. 18.137 × 4 =
  19. 19.67 × 8 =
  20. 20.60 × 8 =
  21. 21.32 × 8 =
  22. 22.19 × 4 =
  23. 23.148 × 4 =
  24. 24.134 × 4 =
  25. 25.134 × 4 =
  26. 26.60 × 4 =
  27. 27.54 × 4 =
  28. 28.46 × 4 =
  29. 29.42 × 4 =
  30. 30.14 × 8 =
  31. 31.93 × 4 =
  32. 32.65 × 8 =
  33. 33.40 × 4 =
  34. 34.52 × 8 =
  35. 35.148 × 4 =
  36. 36.101 × 4 =
  37. 37.131 × 4 =
  38. 38.82 × 4 =
  39. 39.46 × 4 =
  40. 40.52 × 8 =

Answer key

  1. 536
  2. 508
  3. 128
  4. 120
  5. 60
  6. 576
  7. 112
  8. 136
  9. 264
  10. 100
  11. 176
  12. 544
  13. 120
  14. 176
  15. 440
  16. 264
  17. 152
  18. 548
  19. 536
  20. 480
  21. 256
  22. 76
  23. 592
  24. 536
  25. 536
  26. 240
  27. 216
  28. 184
  29. 168
  30. 112
  31. 372
  32. 520
  33. 160
  34. 416
  35. 592
  36. 404
  37. 524
  38. 328
  39. 184
  40. 416

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