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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 525 · 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. 1.132 × 4 =
  2. 2.58 × 8 =
  3. 3.66 × 8 =
  4. 4.77 × 4 =
  5. 5.14 × 8 =
  6. 6.31 × 8 =
  7. 7.30 × 4 =
  8. 8.61 × 8 =
  9. 9.18 × 8 =
  10. 10.71 × 8 =
  11. 11.105 × 4 =
  12. 12.66 × 8 =
  13. 13.138 × 4 =
  14. 14.39 × 4 =
  15. 15.72 × 4 =
  16. 16.13 × 8 =
  17. 17.21 × 8 =
  18. 18.59 × 8 =
  19. 19.39 × 4 =
  20. 20.22 × 4 =
  21. 21.56 × 4 =
  22. 22.134 × 4 =
  23. 23.47 × 8 =
  24. 24.140 × 4 =
  25. 25.16 × 4 =
  26. 26.42 × 4 =
  27. 27.14 × 8 =
  28. 28.31 × 8 =
  29. 29.46 × 4 =
  30. 30.72 × 4 =
  31. 31.37 × 8 =
  32. 32.17 × 8 =
  33. 33.83 × 4 =
  34. 34.129 × 4 =
  35. 35.59 × 8 =
  36. 36.104 × 4 =
  37. 37.66 × 8 =
  38. 38.15 × 8 =
  39. 39.50 × 8 =
  40. 40.23 × 4 =

Answer key

  1. 528
  2. 464
  3. 528
  4. 308
  5. 112
  6. 248
  7. 120
  8. 488
  9. 144
  10. 568
  11. 420
  12. 528
  13. 552
  14. 156
  15. 288
  16. 104
  17. 168
  18. 472
  19. 156
  20. 88
  21. 224
  22. 536
  23. 376
  24. 560
  25. 64
  26. 168
  27. 112
  28. 248
  29. 184
  30. 288
  31. 296
  32. 136
  33. 332
  34. 516
  35. 472
  36. 416
  37. 528
  38. 120
  39. 400
  40. 92

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