157  Leg-Stamp
닭다리 개다리 2

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There are 270 heads of Chickens and Dogs together. Altogether there are 800 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 520 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 220 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?

There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1480 cents. How many 8-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 710 cents. How many 3-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 250장을 사고, 1200 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 160 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 780 cents. How many 3-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?

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