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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 310 · 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. 1.16 × 8 =
  2. 2.46 × 4 =
  3. 3.22 × 4 =
  4. 4.67 × 8 =
  5. 5.25 × 8 =
  6. 6.90 × 4 =
  7. 7.48 × 8 =
  8. 8.57 × 4 =
  9. 9.45 × 8 =
  10. 10.20 × 8 =
  11. 11.14 × 8 =
  12. 12.24 × 8 =
  13. 13.20 × 4 =
  14. 14.110 × 4 =
  15. 15.39 × 8 =
  16. 16.26 × 8 =
  17. 17.65 × 4 =
  18. 18.24 × 4 =
  19. 19.128 × 4 =
  20. 20.18 × 4 =
  21. 21.70 × 8 =
  22. 22.40 × 4 =
  23. 23.25 × 4 =
  24. 24.18 × 4 =
  25. 25.71 × 8 =
  26. 26.112 × 4 =
  27. 27.65 × 8 =
  28. 28.29 × 8 =
  29. 29.15 × 8 =
  30. 30.57 × 8 =
  31. 31.108 × 4 =
  32. 32.57 × 8 =
  33. 33.53 × 4 =
  34. 34.52 × 8 =
  35. 35.16 × 8 =
  36. 36.20 × 8 =
  37. 37.56 × 8 =
  38. 38.143 × 4 =
  39. 39.142 × 4 =
  40. 40.108 × 4 =

Answer key

  1. 128
  2. 184
  3. 88
  4. 536
  5. 200
  6. 360
  7. 384
  8. 228
  9. 360
  10. 160
  11. 112
  12. 192
  13. 80
  14. 440
  15. 312
  16. 208
  17. 260
  18. 96
  19. 512
  20. 72
  21. 560
  22. 160
  23. 100
  24. 72
  25. 568
  26. 448
  27. 520
  28. 232
  29. 120
  30. 456
  31. 432
  32. 456
  33. 212
  34. 416
  35. 128
  36. 160
  37. 448
  38. 572
  39. 568
  40. 432

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