486  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



우리 안에 총 110 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 340 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 220 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1630 cents. How many 8-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 550 cents. How many 4-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 200장을 사고, 1000 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 220 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 910 cents. How many 7-cent stamps are there?

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