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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 936 · 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. 1.80 × 4 =
  2. 2.145 × 4 =
  3. 3.82 × 4 =
  4. 4.101 × 4 =
  5. 5.102 × 4 =
  6. 6.18 × 4 =
  7. 7.103 × 4 =
  8. 8.37 × 8 =
  9. 9.125 × 4 =
  10. 10.77 × 4 =
  11. 11.29 × 4 =
  12. 12.37 × 8 =
  13. 13.67 × 4 =
  14. 14.153 × 4 =
  15. 15.33 × 8 =
  16. 16.35 × 8 =
  17. 17.58 × 8 =
  18. 18.46 × 4 =
  19. 19.125 × 4 =
  20. 20.148 × 4 =
  21. 21.146 × 4 =
  22. 22.17 × 8 =
  23. 23.17 × 8 =
  24. 24.13 × 8 =
  25. 25.160 × 4 =
  26. 26.30 × 8 =
  27. 27.47 × 8 =
  28. 28.72 × 8 =
  29. 29.42 × 4 =
  30. 30.13 × 4 =
  31. 31.102 × 4 =
  32. 32.44 × 4 =
  33. 33.62 × 8 =
  34. 34.39 × 8 =
  35. 35.143 × 4 =
  36. 36.49 × 8 =
  37. 37.60 × 8 =
  38. 38.19 × 8 =
  39. 39.26 × 8 =
  40. 40.62 × 4 =

Answer key

  1. 320
  2. 580
  3. 328
  4. 404
  5. 408
  6. 72
  7. 412
  8. 296
  9. 500
  10. 308
  11. 116
  12. 296
  13. 268
  14. 612
  15. 264
  16. 280
  17. 464
  18. 184
  19. 500
  20. 592
  21. 584
  22. 136
  23. 136
  24. 104
  25. 640
  26. 240
  27. 376
  28. 576
  29. 168
  30. 52
  31. 408
  32. 176
  33. 496
  34. 312
  35. 572
  36. 392
  37. 480
  38. 152
  39. 208
  40. 248

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