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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 260 · 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. 1.23 × 8 =
  2. 2.26 × 8 =
  3. 3.44 × 4 =
  4. 4.111 × 4 =
  5. 5.111 × 4 =
  6. 6.39 × 8 =
  7. 7.46 × 8 =
  8. 8.12 × 8 =
  9. 9.30 × 8 =
  10. 10.55 × 8 =
  11. 11.96 × 4 =
  12. 12.18 × 8 =
  13. 13.30 × 4 =
  14. 14.147 × 4 =
  15. 15.149 × 4 =
  16. 16.67 × 8 =
  17. 17.136 × 4 =
  18. 18.25 × 8 =
  19. 19.49 × 8 =
  20. 20.15 × 4 =
  21. 21.38 × 4 =
  22. 22.96 × 4 =
  23. 23.65 × 4 =
  24. 24.46 × 8 =
  25. 25.31 × 8 =
  26. 26.52 × 8 =
  27. 27.72 × 4 =
  28. 28.42 × 8 =
  29. 29.62 × 8 =
  30. 30.63 × 8 =
  31. 31.91 × 4 =
  32. 32.43 × 8 =
  33. 33.85 × 4 =
  34. 34.129 × 4 =
  35. 35.75 × 4 =
  36. 36.61 × 8 =
  37. 37.27 × 4 =
  38. 38.112 × 4 =
  39. 39.28 × 8 =
  40. 40.133 × 4 =

Answer key

  1. 184
  2. 208
  3. 176
  4. 444
  5. 444
  6. 312
  7. 368
  8. 96
  9. 240
  10. 440
  11. 384
  12. 144
  13. 120
  14. 588
  15. 596
  16. 536
  17. 544
  18. 200
  19. 392
  20. 60
  21. 152
  22. 384
  23. 260
  24. 368
  25. 248
  26. 416
  27. 288
  28. 336
  29. 496
  30. 504
  31. 364
  32. 344
  33. 340
  34. 516
  35. 300
  36. 488
  37. 108
  38. 448
  39. 224
  40. 532

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