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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 425 · 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. 1.41 × 8 =
  2. 2.129 × 4 =
  3. 3.38 × 4 =
  4. 4.52 × 8 =
  5. 5.24 × 4 =
  6. 6.37 × 4 =
  7. 7.38 × 4 =
  8. 8.82 × 4 =
  9. 9.83 × 4 =
  10. 10.70 × 4 =
  11. 11.123 × 4 =
  12. 12.17 × 4 =
  13. 13.42 × 4 =
  14. 14.25 × 8 =
  15. 15.37 × 4 =
  16. 16.31 × 8 =
  17. 17.13 × 4 =
  18. 18.54 × 4 =
  19. 19.117 × 4 =
  20. 20.72 × 4 =
  21. 21.19 × 8 =
  22. 22.68 × 4 =
  23. 23.17 × 4 =
  24. 24.15 × 4 =
  25. 25.18 × 8 =
  26. 26.31 × 8 =
  27. 27.104 × 4 =
  28. 28.101 × 4 =
  29. 29.47 × 4 =
  30. 30.19 × 8 =
  31. 31.62 × 8 =
  32. 32.61 × 8 =
  33. 33.66 × 4 =
  34. 34.154 × 4 =
  35. 35.25 × 8 =
  36. 36.53 × 4 =
  37. 37.47 × 4 =
  38. 38.106 × 4 =
  39. 39.37 × 4 =
  40. 40.70 × 8 =

Answer key

  1. 328
  2. 516
  3. 152
  4. 416
  5. 96
  6. 148
  7. 152
  8. 328
  9. 332
  10. 280
  11. 492
  12. 68
  13. 168
  14. 200
  15. 148
  16. 248
  17. 52
  18. 216
  19. 468
  20. 288
  21. 152
  22. 272
  23. 68
  24. 60
  25. 144
  26. 248
  27. 416
  28. 404
  29. 188
  30. 152
  31. 496
  32. 488
  33. 264
  34. 616
  35. 200
  36. 212
  37. 188
  38. 424
  39. 148
  40. 560

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