576  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



우리 안에 총 260 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 760 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?

There are 270 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1460 cents. How many 3-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



오늘 6원짜리 9원짜리 우표 총 210장을 사고, 1650 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1450 cents. How many 8-cent stamps are there?

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