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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 740 · 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. 1.158 × 4 =
  2. 2.24 × 8 =
  3. 3.145 × 4 =
  4. 4.72 × 8 =
  5. 5.110 × 4 =
  6. 6.37 × 4 =
  7. 7.23 × 8 =
  8. 8.63 × 8 =
  9. 9.12 × 8 =
  10. 10.138 × 4 =
  11. 11.17 × 8 =
  12. 12.68 × 4 =
  13. 13.67 × 8 =
  14. 14.21 × 4 =
  15. 15.42 × 4 =
  16. 16.21 × 8 =
  17. 17.22 × 4 =
  18. 18.80 × 4 =
  19. 19.66 × 4 =
  20. 20.76 × 4 =
  21. 21.108 × 4 =
  22. 22.89 × 4 =
  23. 23.40 × 8 =
  24. 24.88 × 4 =
  25. 25.14 × 8 =
  26. 26.41 × 4 =
  27. 27.37 × 8 =
  28. 28.89 × 4 =
  29. 29.21 × 8 =
  30. 30.158 × 4 =
  31. 31.17 × 4 =
  32. 32.43 × 8 =
  33. 33.60 × 8 =
  34. 34.55 × 4 =
  35. 35.31 × 4 =
  36. 36.82 × 4 =
  37. 37.26 × 4 =
  38. 38.82 × 4 =
  39. 39.61 × 4 =
  40. 40.108 × 4 =

Answer key

  1. 632
  2. 192
  3. 580
  4. 576
  5. 440
  6. 148
  7. 184
  8. 504
  9. 96
  10. 552
  11. 136
  12. 272
  13. 536
  14. 84
  15. 168
  16. 168
  17. 88
  18. 320
  19. 264
  20. 304
  21. 432
  22. 356
  23. 320
  24. 352
  25. 112
  26. 164
  27. 296
  28. 356
  29. 168
  30. 632
  31. 68
  32. 344
  33. 480
  34. 220
  35. 124
  36. 328
  37. 104
  38. 328
  39. 244
  40. 432

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