371  Leg-Stamp
닭다리 개다리 2

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There are 100 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 500 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 260 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?

There are 180 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1180 cents. How many 4-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 160장을 사고, 1060 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 270 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2130 cents. How many 7-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1010 cents. How many 8-cent stamps are there?

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