644  Leg-Stamp
닭다리 개다리 2

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There are 190 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



우리 안에 총 110 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 300 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?

There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 620 cents. How many 3-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 860 cents. How many 4-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 230장을 사고, 1160 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?

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