897  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 100 heads of Chickens and Dogs together. Altogether there are 320 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 230 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?

There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 4-cent stamps are there?



There are 280 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1440 cents. How many 7-cent stamps are there?



오늘 6원짜리 8원짜리 우표 총 210장을 사고, 1460 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 210 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1770 cents. How many 7-cent stamps are there?

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