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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 803 · 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. 1.20 × 4 =
  2. 2.68 × 8 =
  3. 3.39 × 4 =
  4. 4.62 × 8 =
  5. 5.35 × 8 =
  6. 6.55 × 4 =
  7. 7.15 × 4 =
  8. 8.81 × 4 =
  9. 9.58 × 8 =
  10. 10.37 × 4 =
  11. 11.58 × 8 =
  12. 12.41 × 8 =
  13. 13.17 × 8 =
  14. 14.54 × 8 =
  15. 15.46 × 8 =
  16. 16.13 × 8 =
  17. 17.27 × 4 =
  18. 18.53 × 4 =
  19. 19.66 × 4 =
  20. 20.34 × 8 =
  21. 21.23 × 8 =
  22. 22.111 × 4 =
  23. 23.40 × 4 =
  24. 24.37 × 8 =
  25. 25.30 × 4 =
  26. 26.38 × 8 =
  27. 27.129 × 4 =
  28. 28.60 × 8 =
  29. 29.20 × 8 =
  30. 30.34 × 4 =
  31. 31.22 × 8 =
  32. 32.60 × 8 =
  33. 33.54 × 4 =
  34. 34.34 × 8 =
  35. 35.41 × 8 =
  36. 36.122 × 4 =
  37. 37.63 × 8 =
  38. 38.53 × 4 =
  39. 39.114 × 4 =
  40. 40.58 × 8 =

Answer key

  1. 80
  2. 544
  3. 156
  4. 496
  5. 280
  6. 220
  7. 60
  8. 324
  9. 464
  10. 148
  11. 464
  12. 328
  13. 136
  14. 432
  15. 368
  16. 104
  17. 108
  18. 212
  19. 264
  20. 272
  21. 184
  22. 444
  23. 160
  24. 296
  25. 120
  26. 304
  27. 516
  28. 480
  29. 160
  30. 136
  31. 176
  32. 480
  33. 216
  34. 272
  35. 328
  36. 488
  37. 504
  38. 212
  39. 456
  40. 464

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