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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 962 · 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. 1.26 × 8 =
  2. 2.57 × 4 =
  3. 3.39 × 4 =
  4. 4.72 × 8 =
  5. 5.22 × 8 =
  6. 6.125 × 4 =
  7. 7.69 × 8 =
  8. 8.113 × 4 =
  9. 9.15 × 8 =
  10. 10.128 × 4 =
  11. 11.42 × 4 =
  12. 12.160 × 4 =
  13. 13.16 × 8 =
  14. 14.44 × 4 =
  15. 15.24 × 8 =
  16. 16.66 × 8 =
  17. 17.51 × 8 =
  18. 18.141 × 4 =
  19. 19.144 × 4 =
  20. 20.20 × 4 =
  21. 21.133 × 4 =
  22. 22.73 × 8 =
  23. 23.70 × 8 =
  24. 24.15 × 8 =
  25. 25.16 × 8 =
  26. 26.49 × 4 =
  27. 27.98 × 4 =
  28. 28.54 × 4 =
  29. 29.40 × 8 =
  30. 30.72 × 8 =
  31. 31.115 × 4 =
  32. 32.83 × 4 =
  33. 33.137 × 4 =
  34. 34.69 × 8 =
  35. 35.38 × 4 =
  36. 36.60 × 4 =
  37. 37.77 × 4 =
  38. 38.129 × 4 =
  39. 39.150 × 4 =
  40. 40.135 × 4 =

Answer key

  1. 208
  2. 228
  3. 156
  4. 576
  5. 176
  6. 500
  7. 552
  8. 452
  9. 120
  10. 512
  11. 168
  12. 640
  13. 128
  14. 176
  15. 192
  16. 528
  17. 408
  18. 564
  19. 576
  20. 80
  21. 532
  22. 584
  23. 560
  24. 120
  25. 128
  26. 196
  27. 392
  28. 216
  29. 320
  30. 576
  31. 460
  32. 332
  33. 548
  34. 552
  35. 152
  36. 240
  37. 308
  38. 516
  39. 600
  40. 540

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