867  Leg-Stamp
닭다리 개다리 2

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There are 230 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



우리 안에 총 90 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 280 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 170 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 230 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1580 cents. How many 6-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1770 cents. How many 7-cent stamps are there?



오늘 4원짜리 7원짜리 우표 총 160장을 사고, 910 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 250 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1510 cents. How many 7-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1850 cents. How many 7-cent stamps are there?

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