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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 439 · 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. 1.63 × 8 =
  2. 2.79 × 4 =
  3. 3.45 × 4 =
  4. 4.118 × 4 =
  5. 5.41 × 8 =
  6. 6.100 × 4 =
  7. 7.128 × 4 =
  8. 8.22 × 4 =
  9. 9.75 × 4 =
  10. 10.69 × 4 =
  11. 11.46 × 8 =
  12. 12.24 × 4 =
  13. 13.54 × 8 =
  14. 14.154 × 4 =
  15. 15.153 × 4 =
  16. 16.19 × 8 =
  17. 17.29 × 8 =
  18. 18.32 × 8 =
  19. 19.24 × 8 =
  20. 20.36 × 4 =
  21. 21.61 × 8 =
  22. 22.113 × 4 =
  23. 23.16 × 8 =
  24. 24.60 × 4 =
  25. 25.46 × 4 =
  26. 26.43 × 8 =
  27. 27.14 × 8 =
  28. 28.42 × 4 =
  29. 29.160 × 4 =
  30. 30.83 × 4 =
  31. 31.146 × 4 =
  32. 32.40 × 8 =
  33. 33.31 × 8 =
  34. 34.153 × 4 =
  35. 35.141 × 4 =
  36. 36.32 × 4 =
  37. 37.27 × 8 =
  38. 38.67 × 8 =
  39. 39.121 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 504
  2. 316
  3. 180
  4. 472
  5. 328
  6. 400
  7. 512
  8. 88
  9. 300
  10. 276
  11. 368
  12. 96
  13. 432
  14. 616
  15. 612
  16. 152
  17. 232
  18. 256
  19. 192
  20. 144
  21. 488
  22. 452
  23. 128
  24. 240
  25. 184
  26. 344
  27. 112
  28. 168
  29. 640
  30. 332
  31. 584
  32. 320
  33. 248
  34. 612
  35. 564
  36. 128
  37. 216
  38. 536
  39. 484
  40. 408

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