489  Leg-Stamp
닭다리 개다리 2

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There are 190 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



우리 안에 총 90 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 260 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?

There are 260 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1970 cents. How many 8-cent stamps are there?



There are 270 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1900 cents. How many 8-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 260장을 사고, 1170 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 150 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1150 cents. How many 8-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?

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