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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 954 · 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. 1.21 × 8 =
  2. 2.44 × 4 =
  3. 3.78 × 4 =
  4. 4.146 × 4 =
  5. 5.145 × 4 =
  6. 6.77 × 4 =
  7. 7.144 × 4 =
  8. 8.47 × 4 =
  9. 9.126 × 4 =
  10. 10.72 × 8 =
  11. 11.46 × 8 =
  12. 12.47 × 8 =
  13. 13.50 × 8 =
  14. 14.39 × 4 =
  15. 15.21 × 8 =
  16. 16.62 × 8 =
  17. 17.36 × 4 =
  18. 18.57 × 8 =
  19. 19.14 × 4 =
  20. 20.27 × 4 =
  21. 21.72 × 8 =
  22. 22.140 × 4 =
  23. 23.41 × 8 =
  24. 24.45 × 4 =
  25. 25.16 × 8 =
  26. 26.58 × 8 =
  27. 27.145 × 4 =
  28. 28.67 × 8 =
  29. 29.41 × 4 =
  30. 30.64 × 8 =
  31. 31.26 × 4 =
  32. 32.60 × 8 =
  33. 33.94 × 4 =
  34. 34.19 × 4 =
  35. 35.31 × 4 =
  36. 36.77 × 4 =
  37. 37.25 × 4 =
  38. 38.54 × 4 =
  39. 39.30 × 8 =
  40. 40.55 × 8 =

Answer key

  1. 168
  2. 176
  3. 312
  4. 584
  5. 580
  6. 308
  7. 576
  8. 188
  9. 504
  10. 576
  11. 368
  12. 376
  13. 400
  14. 156
  15. 168
  16. 496
  17. 144
  18. 456
  19. 56
  20. 108
  21. 576
  22. 560
  23. 328
  24. 180
  25. 128
  26. 464
  27. 580
  28. 536
  29. 164
  30. 512
  31. 104
  32. 480
  33. 376
  34. 76
  35. 124
  36. 308
  37. 100
  38. 216
  39. 240
  40. 440

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