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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 407 · 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. 1.123 × 4 =
  2. 2.105 × 4 =
  3. 3.49 × 4 =
  4. 4.31 × 8 =
  5. 5.23 × 4 =
  6. 6.24 × 4 =
  7. 7.37 × 4 =
  8. 8.55 × 4 =
  9. 9.48 × 8 =
  10. 10.45 × 8 =
  11. 11.56 × 8 =
  12. 12.88 × 4 =
  13. 13.73 × 4 =
  14. 14.59 × 8 =
  15. 15.70 × 8 =
  16. 16.51 × 8 =
  17. 17.36 × 4 =
  18. 18.26 × 8 =
  19. 19.89 × 4 =
  20. 20.39 × 8 =
  21. 21.69 × 8 =
  22. 22.44 × 4 =
  23. 23.43 × 4 =
  24. 24.154 × 4 =
  25. 25.31 × 8 =
  26. 26.54 × 4 =
  27. 27.141 × 4 =
  28. 28.45 × 4 =
  29. 29.43 × 8 =
  30. 30.39 × 8 =
  31. 31.44 × 8 =
  32. 32.38 × 8 =
  33. 33.37 × 4 =
  34. 34.40 × 8 =
  35. 35.92 × 4 =
  36. 36.74 × 4 =
  37. 37.20 × 4 =
  38. 38.35 × 8 =
  39. 39.116 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 492
  2. 420
  3. 196
  4. 248
  5. 92
  6. 96
  7. 148
  8. 220
  9. 384
  10. 360
  11. 448
  12. 352
  13. 292
  14. 472
  15. 560
  16. 408
  17. 144
  18. 208
  19. 356
  20. 312
  21. 552
  22. 176
  23. 172
  24. 616
  25. 248
  26. 216
  27. 564
  28. 180
  29. 344
  30. 312
  31. 352
  32. 304
  33. 148
  34. 320
  35. 368
  36. 296
  37. 80
  38. 280
  39. 464
  40. 292

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