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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 530 · 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. 1.24 × 8 =
  2. 2.50 × 4 =
  3. 3.107 × 4 =
  4. 4.44 × 4 =
  5. 5.55 × 4 =
  6. 6.120 × 4 =
  7. 7.32 × 8 =
  8. 8.13 × 8 =
  9. 9.116 × 4 =
  10. 10.18 × 8 =
  11. 11.66 × 8 =
  12. 12.48 × 8 =
  13. 13.48 × 8 =
  14. 14.65 × 4 =
  15. 15.59 × 8 =
  16. 16.148 × 4 =
  17. 17.75 × 8 =
  18. 18.104 × 4 =
  19. 19.59 × 4 =
  20. 20.13 × 4 =
  21. 21.152 × 4 =
  22. 22.72 × 4 =
  23. 23.97 × 4 =
  24. 24.115 × 4 =
  25. 25.98 × 4 =
  26. 26.120 × 4 =
  27. 27.63 × 8 =
  28. 28.18 × 8 =
  29. 29.36 × 4 =
  30. 30.28 × 8 =
  31. 31.25 × 8 =
  32. 32.51 × 8 =
  33. 33.84 × 4 =
  34. 34.96 × 4 =
  35. 35.19 × 8 =
  36. 36.160 × 4 =
  37. 37.75 × 8 =
  38. 38.71 × 8 =
  39. 39.50 × 4 =
  40. 40.94 × 4 =

Answer key

  1. 192
  2. 200
  3. 428
  4. 176
  5. 220
  6. 480
  7. 256
  8. 104
  9. 464
  10. 144
  11. 528
  12. 384
  13. 384
  14. 260
  15. 472
  16. 592
  17. 600
  18. 416
  19. 236
  20. 52
  21. 608
  22. 288
  23. 388
  24. 460
  25. 392
  26. 480
  27. 504
  28. 144
  29. 144
  30. 224
  31. 200
  32. 408
  33. 336
  34. 384
  35. 152
  36. 640
  37. 600
  38. 568
  39. 200
  40. 376

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