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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 543 · 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. 1.96 × 4 =
  2. 2.23 × 8 =
  3. 3.119 × 4 =
  4. 4.70 × 8 =
  5. 5.67 × 8 =
  6. 6.68 × 4 =
  7. 7.19 × 4 =
  8. 8.49 × 4 =
  9. 9.56 × 4 =
  10. 10.23 × 8 =
  11. 11.111 × 4 =
  12. 12.93 × 4 =
  13. 13.43 × 8 =
  14. 14.52 × 8 =
  15. 15.40 × 8 =
  16. 16.17 × 8 =
  17. 17.57 × 8 =
  18. 18.98 × 4 =
  19. 19.75 × 4 =
  20. 20.30 × 4 =
  21. 21.156 × 4 =
  22. 22.70 × 4 =
  23. 23.131 × 4 =
  24. 24.15 × 4 =
  25. 25.124 × 4 =
  26. 26.78 × 4 =
  27. 27.61 × 8 =
  28. 28.109 × 4 =
  29. 29.13 × 4 =
  30. 30.87 × 4 =
  31. 31.38 × 4 =
  32. 32.100 × 4 =
  33. 33.71 × 8 =
  34. 34.26 × 4 =
  35. 35.42 × 8 =
  36. 36.91 × 4 =
  37. 37.24 × 8 =
  38. 38.15 × 8 =
  39. 39.110 × 4 =
  40. 40.98 × 4 =

Answer key

  1. 384
  2. 184
  3. 476
  4. 560
  5. 536
  6. 272
  7. 76
  8. 196
  9. 224
  10. 184
  11. 444
  12. 372
  13. 344
  14. 416
  15. 320
  16. 136
  17. 456
  18. 392
  19. 300
  20. 120
  21. 624
  22. 280
  23. 524
  24. 60
  25. 496
  26. 312
  27. 488
  28. 436
  29. 52
  30. 348
  31. 152
  32. 400
  33. 568
  34. 104
  35. 336
  36. 364
  37. 192
  38. 120
  39. 440
  40. 392

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