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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 913 · 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. 1.27 × 4 =
  2. 2.38 × 8 =
  3. 3.34 × 8 =
  4. 4.13 × 8 =
  5. 5.73 × 4 =
  6. 6.67 × 8 =
  7. 7.50 × 4 =
  8. 8.95 × 4 =
  9. 9.16 × 8 =
  10. 10.104 × 4 =
  11. 11.54 × 8 =
  12. 12.24 × 8 =
  13. 13.43 × 8 =
  14. 14.60 × 8 =
  15. 15.37 × 4 =
  16. 16.19 × 8 =
  17. 17.70 × 8 =
  18. 18.51 × 4 =
  19. 19.98 × 4 =
  20. 20.45 × 8 =
  21. 21.146 × 4 =
  22. 22.59 × 4 =
  23. 23.67 × 4 =
  24. 24.92 × 4 =
  25. 25.49 × 4 =
  26. 26.76 × 4 =
  27. 27.117 × 4 =
  28. 28.30 × 4 =
  29. 29.104 × 4 =
  30. 30.46 × 8 =
  31. 31.26 × 8 =
  32. 32.59 × 8 =
  33. 33.100 × 4 =
  34. 34.42 × 8 =
  35. 35.28 × 8 =
  36. 36.14 × 8 =
  37. 37.31 × 8 =
  38. 38.126 × 4 =
  39. 39.158 × 4 =
  40. 40.19 × 4 =

Answer key

  1. 108
  2. 304
  3. 272
  4. 104
  5. 292
  6. 536
  7. 200
  8. 380
  9. 128
  10. 416
  11. 432
  12. 192
  13. 344
  14. 480
  15. 148
  16. 152
  17. 560
  18. 204
  19. 392
  20. 360
  21. 584
  22. 236
  23. 268
  24. 368
  25. 196
  26. 304
  27. 468
  28. 120
  29. 416
  30. 368
  31. 208
  32. 472
  33. 400
  34. 336
  35. 224
  36. 112
  37. 248
  38. 504
  39. 632
  40. 76

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