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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 561 · 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. 1.73 × 8 =
  2. 2.46 × 4 =
  3. 3.29 × 4 =
  4. 4.102 × 4 =
  5. 5.139 × 4 =
  6. 6.19 × 4 =
  7. 7.76 × 4 =
  8. 8.39 × 8 =
  9. 9.148 × 4 =
  10. 10.17 × 8 =
  11. 11.26 × 8 =
  12. 12.156 × 4 =
  13. 13.27 × 8 =
  14. 14.16 × 4 =
  15. 15.47 × 8 =
  16. 16.23 × 8 =
  17. 17.17 × 4 =
  18. 18.95 × 4 =
  19. 19.62 × 8 =
  20. 20.51 × 4 =
  21. 21.55 × 4 =
  22. 22.137 × 4 =
  23. 23.134 × 4 =
  24. 24.32 × 4 =
  25. 25.50 × 8 =
  26. 26.121 × 4 =
  27. 27.52 × 4 =
  28. 28.37 × 8 =
  29. 29.157 × 4 =
  30. 30.18 × 4 =
  31. 31.128 × 4 =
  32. 32.47 × 8 =
  33. 33.142 × 4 =
  34. 34.44 × 8 =
  35. 35.50 × 8 =
  36. 36.23 × 8 =
  37. 37.114 × 4 =
  38. 38.74 × 4 =
  39. 39.45 × 8 =
  40. 40.16 × 8 =

Answer key

  1. 584
  2. 184
  3. 116
  4. 408
  5. 556
  6. 76
  7. 304
  8. 312
  9. 592
  10. 136
  11. 208
  12. 624
  13. 216
  14. 64
  15. 376
  16. 184
  17. 68
  18. 380
  19. 496
  20. 204
  21. 220
  22. 548
  23. 536
  24. 128
  25. 400
  26. 484
  27. 208
  28. 296
  29. 628
  30. 72
  31. 512
  32. 376
  33. 568
  34. 352
  35. 400
  36. 184
  37. 456
  38. 296
  39. 360
  40. 128

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