440  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



우리 안에 총 110 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 340 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 640 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1310 cents. How many 8-cent stamps are there?



오늘 8원짜리 6원짜리 우표 총 240장을 사고, 1660 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?

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