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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 212 · 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 × 4 =
  2. 2.12 × 8 =
  3. 3.15 × 4 =
  4. 4.61 × 8 =
  5. 5.61 × 8 =
  6. 6.54 × 8 =
  7. 7.66 × 4 =
  8. 8.89 × 4 =
  9. 9.42 × 8 =
  10. 10.21 × 8 =
  11. 11.136 × 4 =
  12. 12.72 × 8 =
  13. 13.66 × 4 =
  14. 14.63 × 8 =
  15. 15.85 × 4 =
  16. 16.25 × 4 =
  17. 17.43 × 8 =
  18. 18.146 × 4 =
  19. 19.124 × 4 =
  20. 20.18 × 8 =
  21. 21.22 × 8 =
  22. 22.47 × 8 =
  23. 23.31 × 4 =
  24. 24.31 × 8 =
  25. 25.36 × 8 =
  26. 26.25 × 8 =
  27. 27.69 × 8 =
  28. 28.45 × 8 =
  29. 29.53 × 8 =
  30. 30.47 × 8 =
  31. 31.40 × 8 =
  32. 32.63 × 8 =
  33. 33.40 × 4 =
  34. 34.21 × 4 =
  35. 35.17 × 8 =
  36. 36.69 × 8 =
  37. 37.30 × 4 =
  38. 38.17 × 4 =
  39. 39.75 × 8 =
  40. 40.82 × 4 =

Answer key

  1. 96
  2. 96
  3. 60
  4. 488
  5. 488
  6. 432
  7. 264
  8. 356
  9. 336
  10. 168
  11. 544
  12. 576
  13. 264
  14. 504
  15. 340
  16. 100
  17. 344
  18. 584
  19. 496
  20. 144
  21. 176
  22. 376
  23. 124
  24. 248
  25. 288
  26. 200
  27. 552
  28. 360
  29. 424
  30. 376
  31. 320
  32. 504
  33. 160
  34. 84
  35. 136
  36. 552
  37. 120
  38. 68
  39. 600
  40. 328

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