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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 900 · 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. 1.20 × 8 =
  2. 2.64 × 8 =
  3. 3.26 × 8 =
  4. 4.122 × 4 =
  5. 5.40 × 8 =
  6. 6.30 × 8 =
  7. 7.44 × 4 =
  8. 8.48 × 8 =
  9. 9.104 × 4 =
  10. 10.19 × 8 =
  11. 11.20 × 8 =
  12. 12.24 × 8 =
  13. 13.31 × 8 =
  14. 14.41 × 4 =
  15. 15.33 × 8 =
  16. 16.17 × 8 =
  17. 17.32 × 4 =
  18. 18.90 × 4 =
  19. 19.50 × 4 =
  20. 20.63 × 4 =
  21. 21.48 × 4 =
  22. 22.65 × 4 =
  23. 23.57 × 8 =
  24. 24.19 × 4 =
  25. 25.73 × 8 =
  26. 26.126 × 4 =
  27. 27.14 × 4 =
  28. 28.27 × 8 =
  29. 29.146 × 4 =
  30. 30.74 × 8 =
  31. 31.21 × 8 =
  32. 32.74 × 4 =
  33. 33.20 × 4 =
  34. 34.13 × 4 =
  35. 35.14 × 4 =
  36. 36.26 × 8 =
  37. 37.14 × 4 =
  38. 38.67 × 8 =
  39. 39.15 × 8 =
  40. 40.66 × 8 =

Answer key

  1. 160
  2. 512
  3. 208
  4. 488
  5. 320
  6. 240
  7. 176
  8. 384
  9. 416
  10. 152
  11. 160
  12. 192
  13. 248
  14. 164
  15. 264
  16. 136
  17. 128
  18. 360
  19. 200
  20. 252
  21. 192
  22. 260
  23. 456
  24. 76
  25. 584
  26. 504
  27. 56
  28. 216
  29. 584
  30. 592
  31. 168
  32. 296
  33. 80
  34. 52
  35. 56
  36. 208
  37. 56
  38. 536
  39. 120
  40. 528

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