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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 19 · 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. 1.31 × 8 =
  2. 2.44 × 4 =
  3. 3.110 × 4 =
  4. 4.33 × 4 =
  5. 5.126 × 4 =
  6. 6.37 × 8 =
  7. 7.47 × 4 =
  8. 8.42 × 8 =
  9. 9.135 × 4 =
  10. 10.71 × 4 =
  11. 11.52 × 8 =
  12. 12.55 × 8 =
  13. 13.54 × 4 =
  14. 14.149 × 4 =
  15. 15.37 × 8 =
  16. 16.16 × 8 =
  17. 17.127 × 4 =
  18. 18.50 × 8 =
  19. 19.73 × 4 =
  20. 20.12 × 8 =
  21. 21.36 × 4 =
  22. 22.37 × 8 =
  23. 23.24 × 4 =
  24. 24.74 × 8 =
  25. 25.128 × 4 =
  26. 26.23 × 8 =
  27. 27.131 × 4 =
  28. 28.154 × 4 =
  29. 29.106 × 4 =
  30. 30.34 × 4 =
  31. 31.38 × 8 =
  32. 32.53 × 4 =
  33. 33.45 × 4 =
  34. 34.36 × 4 =
  35. 35.139 × 4 =
  36. 36.51 × 4 =
  37. 37.25 × 8 =
  38. 38.13 × 8 =
  39. 39.115 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 248
  2. 176
  3. 440
  4. 132
  5. 504
  6. 296
  7. 188
  8. 336
  9. 540
  10. 284
  11. 416
  12. 440
  13. 216
  14. 596
  15. 296
  16. 128
  17. 508
  18. 400
  19. 292
  20. 96
  21. 144
  22. 296
  23. 96
  24. 592
  25. 512
  26. 184
  27. 524
  28. 616
  29. 424
  30. 136
  31. 304
  32. 212
  33. 180
  34. 144
  35. 556
  36. 204
  37. 200
  38. 104
  39. 460
  40. 216

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