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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 313 · 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. 1.83 × 4 =
  2. 2.119 × 4 =
  3. 3.147 × 4 =
  4. 4.57 × 8 =
  5. 5.131 × 4 =
  6. 6.98 × 4 =
  7. 7.114 × 4 =
  8. 8.130 × 4 =
  9. 9.24 × 8 =
  10. 10.62 × 8 =
  11. 11.47 × 4 =
  12. 12.83 × 4 =
  13. 13.17 × 4 =
  14. 14.125 × 4 =
  15. 15.29 × 8 =
  16. 16.31 × 4 =
  17. 17.13 × 4 =
  18. 18.14 × 4 =
  19. 19.22 × 8 =
  20. 20.71 × 4 =
  21. 21.145 × 4 =
  22. 22.51 × 8 =
  23. 23.153 × 4 =
  24. 24.73 × 8 =
  25. 25.64 × 4 =
  26. 26.137 × 4 =
  27. 27.42 × 8 =
  28. 28.39 × 4 =
  29. 29.20 × 8 =
  30. 30.46 × 8 =
  31. 31.19 × 4 =
  32. 32.79 × 4 =
  33. 33.13 × 4 =
  34. 34.41 × 4 =
  35. 35.141 × 4 =
  36. 36.21 × 4 =
  37. 37.115 × 4 =
  38. 38.134 × 4 =
  39. 39.42 × 8 =
  40. 40.84 × 4 =

Answer key

  1. 332
  2. 476
  3. 588
  4. 456
  5. 524
  6. 392
  7. 456
  8. 520
  9. 192
  10. 496
  11. 188
  12. 332
  13. 68
  14. 500
  15. 232
  16. 124
  17. 52
  18. 56
  19. 176
  20. 284
  21. 580
  22. 408
  23. 612
  24. 584
  25. 256
  26. 548
  27. 336
  28. 156
  29. 160
  30. 368
  31. 76
  32. 316
  33. 52
  34. 164
  35. 564
  36. 84
  37. 460
  38. 536
  39. 336
  40. 336

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