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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 248 · 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. 1.66 × 8 =
  2. 2.60 × 8 =
  3. 3.100 × 4 =
  4. 4.62 × 4 =
  5. 5.65 × 8 =
  6. 6.44 × 4 =
  7. 7.24 × 4 =
  8. 8.18 × 8 =
  9. 9.17 × 4 =
  10. 10.19 × 4 =
  11. 11.24 × 8 =
  12. 12.129 × 4 =
  13. 13.20 × 8 =
  14. 14.40 × 8 =
  15. 15.29 × 4 =
  16. 16.129 × 4 =
  17. 17.117 × 4 =
  18. 18.35 × 8 =
  19. 19.132 × 4 =
  20. 20.16 × 8 =
  21. 21.106 × 4 =
  22. 22.75 × 4 =
  23. 23.96 × 4 =
  24. 24.123 × 4 =
  25. 25.108 × 4 =
  26. 26.48 × 8 =
  27. 27.141 × 4 =
  28. 28.25 × 8 =
  29. 29.40 × 8 =
  30. 30.39 × 4 =
  31. 31.60 × 8 =
  32. 32.90 × 4 =
  33. 33.67 × 8 =
  34. 34.51 × 8 =
  35. 35.61 × 4 =
  36. 36.15 × 8 =
  37. 37.118 × 4 =
  38. 38.106 × 4 =
  39. 39.42 × 8 =
  40. 40.137 × 4 =

Answer key

  1. 528
  2. 480
  3. 400
  4. 248
  5. 520
  6. 176
  7. 96
  8. 144
  9. 68
  10. 76
  11. 192
  12. 516
  13. 160
  14. 320
  15. 116
  16. 516
  17. 468
  18. 280
  19. 528
  20. 128
  21. 424
  22. 300
  23. 384
  24. 492
  25. 432
  26. 384
  27. 564
  28. 200
  29. 320
  30. 156
  31. 480
  32. 360
  33. 536
  34. 408
  35. 244
  36. 120
  37. 472
  38. 424
  39. 336
  40. 548

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