477  Leg-Stamp
닭다리 개다리 2

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There are 100 heads of Chickens and Dogs together. Altogether there are 260 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 140 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 480 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?

There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1160 cents. How many 7-cent stamps are there?



오늘 6원짜리 9원짜리 우표 총 230장을 사고, 1620 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1380 cents. How many 8-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1200 cents. How many 8-cent stamps are there?

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