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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 917 · 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. 1.33 × 4 =
  2. 2.63 × 8 =
  3. 3.96 × 4 =
  4. 4.76 × 4 =
  5. 5.53 × 8 =
  6. 6.50 × 4 =
  7. 7.138 × 4 =
  8. 8.62 × 8 =
  9. 9.126 × 4 =
  10. 10.30 × 4 =
  11. 11.24 × 8 =
  12. 12.68 × 8 =
  13. 13.35 × 4 =
  14. 14.49 × 8 =
  15. 15.91 × 4 =
  16. 16.30 × 8 =
  17. 17.50 × 8 =
  18. 18.136 × 4 =
  19. 19.41 × 4 =
  20. 20.61 × 8 =
  21. 21.22 × 4 =
  22. 22.56 × 8 =
  23. 23.17 × 8 =
  24. 24.18 × 8 =
  25. 25.52 × 4 =
  26. 26.46 × 4 =
  27. 27.33 × 8 =
  28. 28.31 × 8 =
  29. 29.35 × 8 =
  30. 30.52 × 4 =
  31. 31.65 × 8 =
  32. 32.19 × 4 =
  33. 33.102 × 4 =
  34. 34.131 × 4 =
  35. 35.46 × 8 =
  36. 36.23 × 8 =
  37. 37.24 × 8 =
  38. 38.55 × 8 =
  39. 39.86 × 4 =
  40. 40.53 × 8 =

Answer key

  1. 132
  2. 504
  3. 384
  4. 304
  5. 424
  6. 200
  7. 552
  8. 496
  9. 504
  10. 120
  11. 192
  12. 544
  13. 140
  14. 392
  15. 364
  16. 240
  17. 400
  18. 544
  19. 164
  20. 488
  21. 88
  22. 448
  23. 136
  24. 144
  25. 208
  26. 184
  27. 264
  28. 248
  29. 280
  30. 208
  31. 520
  32. 76
  33. 408
  34. 524
  35. 368
  36. 184
  37. 192
  38. 440
  39. 344
  40. 424

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