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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 205 · 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. 1.52 × 4 =
  2. 2.122 × 4 =
  3. 3.51 × 4 =
  4. 4.28 × 8 =
  5. 5.58 × 8 =
  6. 6.145 × 4 =
  7. 7.61 × 4 =
  8. 8.39 × 8 =
  9. 9.149 × 4 =
  10. 10.67 × 8 =
  11. 11.39 × 4 =
  12. 12.13 × 4 =
  13. 13.55 × 8 =
  14. 14.37 × 8 =
  15. 15.26 × 8 =
  16. 16.33 × 4 =
  17. 17.13 × 4 =
  18. 18.36 × 4 =
  19. 19.57 × 4 =
  20. 20.38 × 8 =
  21. 21.61 × 8 =
  22. 22.24 × 4 =
  23. 23.21 × 4 =
  24. 24.36 × 8 =
  25. 25.13 × 8 =
  26. 26.40 × 4 =
  27. 27.39 × 8 =
  28. 28.53 × 8 =
  29. 29.35 × 8 =
  30. 30.68 × 8 =
  31. 31.13 × 8 =
  32. 32.77 × 4 =
  33. 33.136 × 4 =
  34. 34.29 × 4 =
  35. 35.49 × 4 =
  36. 36.60 × 4 =
  37. 37.53 × 4 =
  38. 38.36 × 8 =
  39. 39.75 × 8 =
  40. 40.63 × 8 =

Answer key

  1. 208
  2. 488
  3. 204
  4. 224
  5. 464
  6. 580
  7. 244
  8. 312
  9. 596
  10. 536
  11. 156
  12. 52
  13. 440
  14. 296
  15. 208
  16. 132
  17. 52
  18. 144
  19. 228
  20. 304
  21. 488
  22. 96
  23. 84
  24. 288
  25. 104
  26. 160
  27. 312
  28. 424
  29. 280
  30. 544
  31. 104
  32. 308
  33. 544
  34. 116
  35. 196
  36. 240
  37. 212
  38. 288
  39. 600
  40. 504

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