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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 499 · 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. 1.75 × 8 =
  2. 2.57 × 4 =
  3. 3.57 × 8 =
  4. 4.63 × 8 =
  5. 5.16 × 8 =
  6. 6.128 × 4 =
  7. 7.24 × 8 =
  8. 8.70 × 4 =
  9. 9.100 × 4 =
  10. 10.34 × 4 =
  11. 11.123 × 4 =
  12. 12.96 × 4 =
  13. 13.130 × 4 =
  14. 14.73 × 8 =
  15. 15.64 × 4 =
  16. 16.159 × 4 =
  17. 17.116 × 4 =
  18. 18.48 × 8 =
  19. 19.69 × 8 =
  20. 20.57 × 8 =
  21. 21.87 × 4 =
  22. 22.29 × 4 =
  23. 23.46 × 4 =
  24. 24.139 × 4 =
  25. 25.43 × 8 =
  26. 26.38 × 4 =
  27. 27.51 × 4 =
  28. 28.57 × 8 =
  29. 29.63 × 8 =
  30. 30.160 × 4 =
  31. 31.54 × 8 =
  32. 32.108 × 4 =
  33. 33.90 × 4 =
  34. 34.121 × 4 =
  35. 35.13 × 4 =
  36. 36.54 × 8 =
  37. 37.71 × 4 =
  38. 38.74 × 4 =
  39. 39.55 × 4 =
  40. 40.49 × 8 =

Answer key

  1. 600
  2. 228
  3. 456
  4. 504
  5. 128
  6. 512
  7. 192
  8. 280
  9. 400
  10. 136
  11. 492
  12. 384
  13. 520
  14. 584
  15. 256
  16. 636
  17. 464
  18. 384
  19. 552
  20. 456
  21. 348
  22. 116
  23. 184
  24. 556
  25. 344
  26. 152
  27. 204
  28. 456
  29. 504
  30. 640
  31. 432
  32. 432
  33. 360
  34. 484
  35. 52
  36. 432
  37. 284
  38. 296
  39. 220
  40. 392

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