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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 819 · 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. 1.13 × 8 =
  2. 2.27 × 8 =
  3. 3.42 × 8 =
  4. 4.133 × 4 =
  5. 5.70 × 4 =
  6. 6.46 × 8 =
  7. 7.13 × 4 =
  8. 8.35 × 4 =
  9. 9.18 × 8 =
  10. 10.67 × 4 =
  11. 11.156 × 4 =
  12. 12.33 × 4 =
  13. 13.73 × 8 =
  14. 14.138 × 4 =
  15. 15.21 × 8 =
  16. 16.62 × 4 =
  17. 17.71 × 8 =
  18. 18.50 × 4 =
  19. 19.37 × 4 =
  20. 20.29 × 8 =
  21. 21.94 × 4 =
  22. 22.92 × 4 =
  23. 23.67 × 4 =
  24. 24.42 × 8 =
  25. 25.48 × 4 =
  26. 26.42 × 8 =
  27. 27.55 × 8 =
  28. 28.18 × 8 =
  29. 29.74 × 8 =
  30. 30.40 × 8 =
  31. 31.107 × 4 =
  32. 32.38 × 4 =
  33. 33.83 × 4 =
  34. 34.53 × 4 =
  35. 35.57 × 8 =
  36. 36.72 × 8 =
  37. 37.114 × 4 =
  38. 38.87 × 4 =
  39. 39.39 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 104
  2. 216
  3. 336
  4. 532
  5. 280
  6. 368
  7. 52
  8. 140
  9. 144
  10. 268
  11. 624
  12. 132
  13. 584
  14. 552
  15. 168
  16. 248
  17. 568
  18. 200
  19. 148
  20. 232
  21. 376
  22. 368
  23. 268
  24. 336
  25. 192
  26. 336
  27. 440
  28. 144
  29. 592
  30. 320
  31. 428
  32. 152
  33. 332
  34. 212
  35. 456
  36. 576
  37. 456
  38. 348
  39. 312
  40. 312

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