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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 904 · 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. 1.101 × 4 =
  2. 2.75 × 8 =
  3. 3.21 × 8 =
  4. 4.78 × 4 =
  5. 5.134 × 4 =
  6. 6.20 × 8 =
  7. 7.23 × 4 =
  8. 8.23 × 8 =
  9. 9.55 × 8 =
  10. 10.129 × 4 =
  11. 11.40 × 8 =
  12. 12.127 × 4 =
  13. 13.34 × 8 =
  14. 14.100 × 4 =
  15. 15.21 × 8 =
  16. 16.75 × 8 =
  17. 17.24 × 8 =
  18. 18.42 × 4 =
  19. 19.13 × 8 =
  20. 20.12 × 8 =
  21. 21.144 × 4 =
  22. 22.62 × 8 =
  23. 23.25 × 8 =
  24. 24.119 × 4 =
  25. 25.56 × 8 =
  26. 26.76 × 4 =
  27. 27.21 × 4 =
  28. 28.16 × 8 =
  29. 29.136 × 4 =
  30. 30.75 × 8 =
  31. 31.48 × 4 =
  32. 32.28 × 8 =
  33. 33.138 × 4 =
  34. 34.126 × 4 =
  35. 35.39 × 4 =
  36. 36.122 × 4 =
  37. 37.155 × 4 =
  38. 38.52 × 4 =
  39. 39.76 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 404
  2. 600
  3. 168
  4. 312
  5. 536
  6. 160
  7. 92
  8. 184
  9. 440
  10. 516
  11. 320
  12. 508
  13. 272
  14. 400
  15. 168
  16. 600
  17. 192
  18. 168
  19. 104
  20. 96
  21. 576
  22. 496
  23. 200
  24. 476
  25. 448
  26. 304
  27. 84
  28. 128
  29. 544
  30. 600
  31. 192
  32. 224
  33. 552
  34. 504
  35. 156
  36. 488
  37. 620
  38. 208
  39. 304
  40. 188

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