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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 263 · 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. 1.30 × 8 =
  2. 2.56 × 8 =
  3. 3.121 × 4 =
  4. 4.70 × 8 =
  5. 5.35 × 4 =
  6. 6.114 × 4 =
  7. 7.23 × 8 =
  8. 8.23 × 8 =
  9. 9.57 × 8 =
  10. 10.57 × 8 =
  11. 11.80 × 4 =
  12. 12.51 × 8 =
  13. 13.42 × 8 =
  14. 14.47 × 8 =
  15. 15.30 × 4 =
  16. 16.57 × 8 =
  17. 17.26 × 4 =
  18. 18.89 × 4 =
  19. 19.24 × 4 =
  20. 20.18 × 8 =
  21. 21.31 × 8 =
  22. 22.30 × 4 =
  23. 23.14 × 8 =
  24. 24.65 × 8 =
  25. 25.26 × 8 =
  26. 26.26 × 8 =
  27. 27.134 × 4 =
  28. 28.43 × 8 =
  29. 29.123 × 4 =
  30. 30.58 × 4 =
  31. 31.144 × 4 =
  32. 32.28 × 8 =
  33. 33.15 × 8 =
  34. 34.135 × 4 =
  35. 35.136 × 4 =
  36. 36.27 × 4 =
  37. 37.41 × 8 =
  38. 38.138 × 4 =
  39. 39.64 × 4 =
  40. 40.58 × 8 =

Answer key

  1. 240
  2. 448
  3. 484
  4. 560
  5. 140
  6. 456
  7. 184
  8. 184
  9. 456
  10. 456
  11. 320
  12. 408
  13. 336
  14. 376
  15. 120
  16. 456
  17. 104
  18. 356
  19. 96
  20. 144
  21. 248
  22. 120
  23. 112
  24. 520
  25. 208
  26. 208
  27. 536
  28. 344
  29. 492
  30. 232
  31. 576
  32. 224
  33. 120
  34. 540
  35. 544
  36. 108
  37. 328
  38. 552
  39. 256
  40. 464

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