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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 625 · 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. 1.34 × 4 =
  2. 2.23 × 8 =
  3. 3.109 × 4 =
  4. 4.141 × 4 =
  5. 5.103 × 4 =
  6. 6.89 × 4 =
  7. 7.24 × 8 =
  8. 8.125 × 4 =
  9. 9.14 × 4 =
  10. 10.35 × 8 =
  11. 11.32 × 8 =
  12. 12.23 × 8 =
  13. 13.99 × 4 =
  14. 14.61 × 8 =
  15. 15.49 × 4 =
  16. 16.48 × 4 =
  17. 17.25 × 8 =
  18. 18.116 × 4 =
  19. 19.99 × 4 =
  20. 20.41 × 8 =
  21. 21.144 × 4 =
  22. 22.133 × 4 =
  23. 23.16 × 4 =
  24. 24.104 × 4 =
  25. 25.39 × 8 =
  26. 26.102 × 4 =
  27. 27.23 × 4 =
  28. 28.40 × 8 =
  29. 29.29 × 8 =
  30. 30.54 × 8 =
  31. 31.141 × 4 =
  32. 32.53 × 8 =
  33. 33.80 × 4 =
  34. 34.83 × 4 =
  35. 35.130 × 4 =
  36. 36.25 × 4 =
  37. 37.54 × 8 =
  38. 38.153 × 4 =
  39. 39.73 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 136
  2. 184
  3. 436
  4. 564
  5. 412
  6. 356
  7. 192
  8. 500
  9. 56
  10. 280
  11. 256
  12. 184
  13. 396
  14. 488
  15. 196
  16. 192
  17. 200
  18. 464
  19. 396
  20. 328
  21. 576
  22. 532
  23. 64
  24. 416
  25. 312
  26. 408
  27. 92
  28. 320
  29. 232
  30. 432
  31. 564
  32. 424
  33. 320
  34. 332
  35. 520
  36. 100
  37. 432
  38. 612
  39. 584
  40. 304

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