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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 182 · 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. 1.68 × 4 =
  2. 2.88 × 4 =
  3. 3.26 × 8 =
  4. 4.101 × 4 =
  5. 5.55 × 4 =
  6. 6.101 × 4 =
  7. 7.122 × 4 =
  8. 8.32 × 8 =
  9. 9.31 × 8 =
  10. 10.23 × 8 =
  11. 11.55 × 8 =
  12. 12.18 × 8 =
  13. 13.14 × 8 =
  14. 14.31 × 4 =
  15. 15.24 × 4 =
  16. 16.50 × 8 =
  17. 17.43 × 4 =
  18. 18.43 × 4 =
  19. 19.60 × 8 =
  20. 20.38 × 4 =
  21. 21.80 × 4 =
  22. 22.152 × 4 =
  23. 23.60 × 8 =
  24. 24.20 × 8 =
  25. 25.47 × 8 =
  26. 26.131 × 4 =
  27. 27.50 × 8 =
  28. 28.46 × 8 =
  29. 29.14 × 8 =
  30. 30.36 × 8 =
  31. 31.25 × 8 =
  32. 32.132 × 4 =
  33. 33.91 × 4 =
  34. 34.49 × 8 =
  35. 35.54 × 8 =
  36. 36.32 × 4 =
  37. 37.19 × 8 =
  38. 38.63 × 4 =
  39. 39.30 × 8 =
  40. 40.48 × 4 =

Answer key

  1. 272
  2. 352
  3. 208
  4. 404
  5. 220
  6. 404
  7. 488
  8. 256
  9. 248
  10. 184
  11. 440
  12. 144
  13. 112
  14. 124
  15. 96
  16. 400
  17. 172
  18. 172
  19. 480
  20. 152
  21. 320
  22. 608
  23. 480
  24. 160
  25. 376
  26. 524
  27. 400
  28. 368
  29. 112
  30. 288
  31. 200
  32. 528
  33. 364
  34. 392
  35. 432
  36. 128
  37. 152
  38. 252
  39. 240
  40. 192

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