128  Leg-Stamp
닭다리 개다리 2

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There are 240 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



우리 안에 총 160 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?

There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 7-cent stamps are there?



오늘 5원짜리 7원짜리 우표 총 230장을 사고, 1370 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 160 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 720 cents. How many 4-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1970 cents. How many 7-cent stamps are there?

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