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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 709 · 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. 1.56 × 4 =
  2. 2.27 × 8 =
  3. 3.54 × 8 =
  4. 4.68 × 4 =
  5. 5.27 × 4 =
  6. 6.68 × 8 =
  7. 7.46 × 8 =
  8. 8.23 × 4 =
  9. 9.100 × 4 =
  10. 10.102 × 4 =
  11. 11.17 × 8 =
  12. 12.50 × 8 =
  13. 13.69 × 8 =
  14. 14.59 × 8 =
  15. 15.50 × 8 =
  16. 16.42 × 8 =
  17. 17.39 × 4 =
  18. 18.73 × 4 =
  19. 19.156 × 4 =
  20. 20.159 × 4 =
  21. 21.35 × 8 =
  22. 22.43 × 8 =
  23. 23.111 × 4 =
  24. 24.126 × 4 =
  25. 25.67 × 4 =
  26. 26.53 × 8 =
  27. 27.32 × 4 =
  28. 28.66 × 8 =
  29. 29.18 × 8 =
  30. 30.14 × 4 =
  31. 31.45 × 8 =
  32. 32.67 × 4 =
  33. 33.33 × 4 =
  34. 34.19 × 8 =
  35. 35.121 × 4 =
  36. 36.122 × 4 =
  37. 37.19 × 4 =
  38. 38.50 × 4 =
  39. 39.84 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 224
  2. 216
  3. 432
  4. 272
  5. 108
  6. 544
  7. 368
  8. 92
  9. 400
  10. 408
  11. 136
  12. 400
  13. 552
  14. 472
  15. 400
  16. 336
  17. 156
  18. 292
  19. 624
  20. 636
  21. 280
  22. 344
  23. 444
  24. 504
  25. 268
  26. 424
  27. 128
  28. 528
  29. 144
  30. 56
  31. 360
  32. 268
  33. 132
  34. 152
  35. 484
  36. 488
  37. 76
  38. 200
  39. 336
  40. 240

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