348  Leg-Stamp
닭다리 개다리 2

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There are 100 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



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



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 170 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?

There are 150 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1020 cents. How many 8-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1200 cents. How many 4-cent stamps are there?



오늘 7원짜리 4원짜리 우표 총 280장을 사고, 1570 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1560 cents. How many 7-cent stamps are there?

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