801  Leg-Stamp
닭다리 개다리 2

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There are 180 heads of Chickens and Dogs together. Altogether there are 460 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 230 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 640 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 210 heads of Chickens and Dogs together. Altogether there are 640 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 140 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1140 cents. How many 4-cent stamps are there?



오늘 3원짜리 8원짜리 우표 총 200장을 사고, 1000 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 260 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1300 cents. How many 4-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1360 cents. How many 7-cent stamps are there?

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