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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 680 · 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. 1.49 × 8 =
  2. 2.146 × 4 =
  3. 3.14 × 8 =
  4. 4.152 × 4 =
  5. 5.43 × 4 =
  6. 6.62 × 4 =
  7. 7.75 × 4 =
  8. 8.131 × 4 =
  9. 9.96 × 4 =
  10. 10.55 × 8 =
  11. 11.88 × 4 =
  12. 12.55 × 4 =
  13. 13.23 × 4 =
  14. 14.141 × 4 =
  15. 15.43 × 8 =
  16. 16.55 × 8 =
  17. 17.23 × 4 =
  18. 18.83 × 4 =
  19. 19.64 × 8 =
  20. 20.34 × 8 =
  21. 21.30 × 8 =
  22. 22.127 × 4 =
  23. 23.63 × 8 =
  24. 24.12 × 8 =
  25. 25.87 × 4 =
  26. 26.43 × 8 =
  27. 27.40 × 8 =
  28. 28.57 × 8 =
  29. 29.141 × 4 =
  30. 30.28 × 4 =
  31. 31.59 × 4 =
  32. 32.140 × 4 =
  33. 33.75 × 8 =
  34. 34.83 × 4 =
  35. 35.14 × 8 =
  36. 36.36 × 4 =
  37. 37.36 × 4 =
  38. 38.71 × 4 =
  39. 39.28 × 8 =
  40. 40.22 × 8 =

Answer key

  1. 392
  2. 584
  3. 112
  4. 608
  5. 172
  6. 248
  7. 300
  8. 524
  9. 384
  10. 440
  11. 352
  12. 220
  13. 92
  14. 564
  15. 344
  16. 440
  17. 92
  18. 332
  19. 512
  20. 272
  21. 240
  22. 508
  23. 504
  24. 96
  25. 348
  26. 344
  27. 320
  28. 456
  29. 564
  30. 112
  31. 236
  32. 560
  33. 600
  34. 332
  35. 112
  36. 144
  37. 144
  38. 284
  39. 224
  40. 176

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