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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 136 · 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. 1.102 × 4 =
  2. 2.21 × 8 =
  3. 3.22 × 8 =
  4. 4.26 × 4 =
  5. 5.43 × 8 =
  6. 6.43 × 8 =
  7. 7.12 × 8 =
  8. 8.61 × 8 =
  9. 9.52 × 8 =
  10. 10.40 × 8 =
  11. 11.26 × 4 =
  12. 12.61 × 8 =
  13. 13.61 × 8 =
  14. 14.55 × 4 =
  15. 15.41 × 8 =
  16. 16.54 × 4 =
  17. 17.52 × 8 =
  18. 18.29 × 8 =
  19. 19.12 × 8 =
  20. 20.68 × 8 =
  21. 21.28 × 8 =
  22. 22.60 × 8 =
  23. 23.45 × 8 =
  24. 24.65 × 4 =
  25. 25.158 × 4 =
  26. 26.51 × 4 =
  27. 27.38 × 8 =
  28. 28.20 × 8 =
  29. 29.32 × 8 =
  30. 30.14 × 4 =
  31. 31.113 × 4 =
  32. 32.13 × 4 =
  33. 33.101 × 4 =
  34. 34.55 × 8 =
  35. 35.20 × 8 =
  36. 36.104 × 4 =
  37. 37.41 × 8 =
  38. 38.39 × 4 =
  39. 39.84 × 4 =
  40. 40.64 × 8 =

Answer key

  1. 408
  2. 168
  3. 176
  4. 104
  5. 344
  6. 344
  7. 96
  8. 488
  9. 416
  10. 320
  11. 104
  12. 488
  13. 488
  14. 220
  15. 328
  16. 216
  17. 416
  18. 232
  19. 96
  20. 544
  21. 224
  22. 480
  23. 360
  24. 260
  25. 632
  26. 204
  27. 304
  28. 160
  29. 256
  30. 56
  31. 452
  32. 52
  33. 404
  34. 440
  35. 160
  36. 416
  37. 328
  38. 156
  39. 336
  40. 512

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