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1. 1. 420. -. =. b). 11). a). =. 420. 660. 660. 200. 1. 1. a). =. 12). +. =. b). 120. 200. 120. 450. 1. 1. 13). a). =. -. =. b). 180. 450. 180. 1. 1. 240. +. =. =. 14). a). b). 900. 240. 900. 1. 1. 360. -. =. =. b). 15). 360. 560. 560.

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660

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  1. 1 1 420 - = b) 11) a) = 420 660 660 200 1 1 a) = 12) + = b) 120 200 120 450 1 1 13) a) = - = b) 180 450 180 1 1 240 + = = 14) a) b) 900 240 900 1 1 360 - = = b) 15) 360 560 560

  2. Prímtényezős felbontás
 - 11. feladat - :6 :6 11 7 420·11 ·11 420 4620 ·11 ·7 Számold ki! 11 - 7 ·7 420 = 660·7 660 4620 = 1 1 4620 4 - = 420 660 4620

  3. Prímtényezős felbontás
 - 12. feladat - :4 :4 5 3 = 1 3 2 200·3 = 600 ·3 Számold ki! ·5 ·3 120·5 = 600 3 + 5 ·5 200 = 120 = 8 600 1 1 + = 600 :8 200 120 1 :8 = 75

  4. Prímtényezős felbontás
 - 13. feladat - :9 :9 2 5 = 1 2 1 450·5 = 900 ·2 180·5 = 900 Számold ki! ·5 ·2 2 - 5 ·5 450 = 180 900 3 1 1 = - - = 900 :3 450 180 = 1 :3 - 300

  5. Prímtényezős felbontás
 - 14. feladat - :6 :6 15 4 ·15 240·15 1200 3600 Számold ki! ·15 ·4 15 + 4 ·4 240 = 900 900·4 = 3600 1 1 = + = 3600 19 240 900 3600

  6. Prímtényezős felbontás
 - 15. feladat - :4 :4 14 9 360·14 1440 5040 ·14 ·9 560·9 ·14 14 - 9 Számold ki! 5040 ·9 360 = 560 = 5040 5 1 1 5040 - :5 = = 360 560 1 :5 1008

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