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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 743 · 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. 1.51 × 8 =
  2. 2.29 × 8 =
  3. 3.54 × 4 =
  4. 4.75 × 8 =
  5. 5.73 × 4 =
  6. 6.101 × 4 =
  7. 7.53 × 8 =
  8. 8.24 × 8 =
  9. 9.19 × 8 =
  10. 10.33 × 8 =
  11. 11.23 × 8 =
  12. 12.46 × 4 =
  13. 13.72 × 8 =
  14. 14.42 × 8 =
  15. 15.132 × 4 =
  16. 16.139 × 4 =
  17. 17.13 × 8 =
  18. 18.120 × 4 =
  19. 19.13 × 8 =
  20. 20.52 × 4 =
  21. 21.32 × 8 =
  22. 22.72 × 8 =
  23. 23.48 × 8 =
  24. 24.67 × 8 =
  25. 25.74 × 8 =
  26. 26.36 × 8 =
  27. 27.58 × 8 =
  28. 28.64 × 8 =
  29. 29.15 × 8 =
  30. 30.34 × 8 =
  31. 31.81 × 4 =
  32. 32.50 × 8 =
  33. 33.85 × 4 =
  34. 34.70 × 8 =
  35. 35.53 × 8 =
  36. 36.25 × 8 =
  37. 37.95 × 4 =
  38. 38.159 × 4 =
  39. 39.53 × 8 =
  40. 40.76 × 4 =

Answer key

  1. 408
  2. 232
  3. 216
  4. 600
  5. 292
  6. 404
  7. 424
  8. 192
  9. 152
  10. 264
  11. 184
  12. 184
  13. 576
  14. 336
  15. 528
  16. 556
  17. 104
  18. 480
  19. 104
  20. 208
  21. 256
  22. 576
  23. 384
  24. 536
  25. 592
  26. 288
  27. 464
  28. 512
  29. 120
  30. 272
  31. 324
  32. 400
  33. 340
  34. 560
  35. 424
  36. 200
  37. 380
  38. 636
  39. 424
  40. 304

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