417  Leg-Stamp
닭다리 개다리 2

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There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 320 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 240 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 200 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 760 cents. How many 7-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 230장을 사고, 1920 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 240 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?

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