121  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 400 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 170 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?

There are 230 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 780 cents. How many 3-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 4-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 240장을 사고, 1240 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1150 cents. How many 6-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1160 cents. How many 6-cent stamps are there?

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