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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 632 · 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. 1.21 × 8 =
  2. 2.61 × 8 =
  3. 3.67 × 8 =
  4. 4.21 × 8 =
  5. 5.55 × 8 =
  6. 6.45 × 8 =
  7. 7.108 × 4 =
  8. 8.110 × 4 =
  9. 9.19 × 8 =
  10. 10.13 × 4 =
  11. 11.150 × 4 =
  12. 12.12 × 8 =
  13. 13.42 × 8 =
  14. 14.75 × 8 =
  15. 15.55 × 8 =
  16. 16.62 × 8 =
  17. 17.13 × 4 =
  18. 18.44 × 8 =
  19. 19.127 × 4 =
  20. 20.61 × 4 =
  21. 21.105 × 4 =
  22. 22.42 × 4 =
  23. 23.92 × 4 =
  24. 24.32 × 8 =
  25. 25.48 × 8 =
  26. 26.136 × 4 =
  27. 27.69 × 8 =
  28. 28.69 × 8 =
  29. 29.49 × 8 =
  30. 30.89 × 4 =
  31. 31.27 × 4 =
  32. 32.52 × 4 =
  33. 33.28 × 8 =
  34. 34.54 × 4 =
  35. 35.107 × 4 =
  36. 36.16 × 8 =
  37. 37.27 × 8 =
  38. 38.112 × 4 =
  39. 39.75 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 168
  2. 488
  3. 536
  4. 168
  5. 440
  6. 360
  7. 432
  8. 440
  9. 152
  10. 52
  11. 600
  12. 96
  13. 336
  14. 600
  15. 440
  16. 496
  17. 52
  18. 352
  19. 508
  20. 244
  21. 420
  22. 168
  23. 368
  24. 256
  25. 384
  26. 544
  27. 552
  28. 552
  29. 392
  30. 356
  31. 108
  32. 208
  33. 224
  34. 216
  35. 428
  36. 128
  37. 216
  38. 448
  39. 600
  40. 148

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