297  Leg-Stamp
닭다리 개다리 2

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There are 130 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



우리 안에 총 210 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 680 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 170 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?

There are 170 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1290 cents. How many 7-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 740 cents. How many 4-cent stamps are there?



오늘 7원짜리 4원짜리 우표 총 230장을 사고, 1340 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 160 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?

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