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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 593 · 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. 1.17 × 8 =
  2. 2.24 × 4 =
  3. 3.65 × 8 =
  4. 4.129 × 4 =
  5. 5.12 × 8 =
  6. 6.46 × 4 =
  7. 7.26 × 8 =
  8. 8.25 × 8 =
  9. 9.105 × 4 =
  10. 10.127 × 4 =
  11. 11.42 × 8 =
  12. 12.116 × 4 =
  13. 13.126 × 4 =
  14. 14.155 × 4 =
  15. 15.52 × 4 =
  16. 16.15 × 8 =
  17. 17.74 × 8 =
  18. 18.29 × 8 =
  19. 19.15 × 4 =
  20. 20.16 × 8 =
  21. 21.37 × 4 =
  22. 22.14 × 8 =
  23. 23.26 × 8 =
  24. 24.102 × 4 =
  25. 25.26 × 4 =
  26. 26.55 × 4 =
  27. 27.45 × 8 =
  28. 28.87 × 4 =
  29. 29.42 × 4 =
  30. 30.47 × 8 =
  31. 31.13 × 8 =
  32. 32.58 × 8 =
  33. 33.18 × 8 =
  34. 34.27 × 8 =
  35. 35.133 × 4 =
  36. 36.56 × 4 =
  37. 37.26 × 4 =
  38. 38.24 × 4 =
  39. 39.19 × 8 =
  40. 40.99 × 4 =

Answer key

  1. 136
  2. 96
  3. 520
  4. 516
  5. 96
  6. 184
  7. 208
  8. 200
  9. 420
  10. 508
  11. 336
  12. 464
  13. 504
  14. 620
  15. 208
  16. 120
  17. 592
  18. 232
  19. 60
  20. 128
  21. 148
  22. 112
  23. 208
  24. 408
  25. 104
  26. 220
  27. 360
  28. 348
  29. 168
  30. 376
  31. 104
  32. 464
  33. 144
  34. 216
  35. 532
  36. 224
  37. 104
  38. 96
  39. 152
  40. 396

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