911  Leg-Stamp
닭다리 개다리 2

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There are 210 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 400 legs. How many chickens are there?



우리 안에 총 230 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 720 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 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 160 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 910 cents. How many 4-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?



오늘 8원짜리 7원짜리 우표 총 210장을 사고, 1550 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 150 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 7-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 6-cent stamps are there?

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