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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 846 · 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. 1.81 × 4 =
  2. 2.136 × 4 =
  3. 3.88 × 4 =
  4. 4.48 × 8 =
  5. 5.104 × 4 =
  6. 6.54 × 8 =
  7. 7.24 × 8 =
  8. 8.42 × 8 =
  9. 9.25 × 8 =
  10. 10.30 × 8 =
  11. 11.72 × 4 =
  12. 12.48 × 8 =
  13. 13.15 × 4 =
  14. 14.54 × 8 =
  15. 15.67 × 8 =
  16. 16.27 × 8 =
  17. 17.15 × 8 =
  18. 18.103 × 4 =
  19. 19.151 × 4 =
  20. 20.115 × 4 =
  21. 21.106 × 4 =
  22. 22.89 × 4 =
  23. 23.74 × 8 =
  24. 24.21 × 8 =
  25. 25.73 × 8 =
  26. 26.71 × 4 =
  27. 27.92 × 4 =
  28. 28.18 × 8 =
  29. 29.97 × 4 =
  30. 30.14 × 8 =
  31. 31.13 × 4 =
  32. 32.50 × 4 =
  33. 33.23 × 4 =
  34. 34.42 × 8 =
  35. 35.17 × 8 =
  36. 36.78 × 4 =
  37. 37.76 × 4 =
  38. 38.16 × 4 =
  39. 39.30 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 324
  2. 544
  3. 352
  4. 384
  5. 416
  6. 432
  7. 192
  8. 336
  9. 200
  10. 240
  11. 288
  12. 384
  13. 60
  14. 432
  15. 536
  16. 216
  17. 120
  18. 412
  19. 604
  20. 460
  21. 424
  22. 356
  23. 592
  24. 168
  25. 584
  26. 284
  27. 368
  28. 144
  29. 388
  30. 112
  31. 52
  32. 200
  33. 92
  34. 336
  35. 136
  36. 312
  37. 304
  38. 64
  39. 120
  40. 148

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