290  Leg-Stamp
닭다리 개다리 2

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There are 120 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



우리 안에 총 150 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 500 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 180 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 230 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1490 cents. How many 7-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?



오늘 4원짜리 3원짜리 우표 총 170장을 사고, 600 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 200 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 760 cents. How many 6-cent stamps are there?

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