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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 374 · 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. 1.37 × 4 =
  2. 2.31 × 4 =
  3. 3.38 × 8 =
  4. 4.138 × 4 =
  5. 5.44 × 8 =
  6. 6.26 × 8 =
  7. 7.37 × 8 =
  8. 8.40 × 8 =
  9. 9.30 × 4 =
  10. 10.55 × 8 =
  11. 11.37 × 8 =
  12. 12.47 × 4 =
  13. 13.28 × 4 =
  14. 14.117 × 4 =
  15. 15.128 × 4 =
  16. 16.43 × 8 =
  17. 17.33 × 8 =
  18. 18.73 × 4 =
  19. 19.36 × 8 =
  20. 20.32 × 8 =
  21. 21.53 × 4 =
  22. 22.34 × 8 =
  23. 23.31 × 8 =
  24. 24.39 × 4 =
  25. 25.45 × 4 =
  26. 26.28 × 8 =
  27. 27.53 × 8 =
  28. 28.96 × 4 =
  29. 29.116 × 4 =
  30. 30.108 × 4 =
  31. 31.129 × 4 =
  32. 32.55 × 8 =
  33. 33.31 × 8 =
  34. 34.54 × 8 =
  35. 35.16 × 8 =
  36. 36.51 × 4 =
  37. 37.15 × 4 =
  38. 38.131 × 4 =
  39. 39.70 × 8 =
  40. 40.142 × 4 =

Answer key

  1. 148
  2. 124
  3. 304
  4. 552
  5. 352
  6. 208
  7. 296
  8. 320
  9. 120
  10. 440
  11. 296
  12. 188
  13. 112
  14. 468
  15. 512
  16. 344
  17. 264
  18. 292
  19. 288
  20. 256
  21. 212
  22. 272
  23. 248
  24. 156
  25. 180
  26. 224
  27. 424
  28. 384
  29. 464
  30. 432
  31. 516
  32. 440
  33. 248
  34. 432
  35. 128
  36. 204
  37. 60
  38. 524
  39. 560
  40. 568

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