799  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 540 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 250 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?

There are 250 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1450 cents. How many 8-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 5-cent stamps are there?



오늘 4원짜리 5원짜리 우표 총 220장을 사고, 990 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 190 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1600 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 8-cent stamps are there?

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