619  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



우리 안에 총 140 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 440 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



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

There are 230 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1710 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1450 cents. How many 6-cent stamps are there?



오늘 6원짜리 5원짜리 우표 총 200장을 사고, 1090 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1380 cents. How many 7-cent stamps are there?

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