270  Leg-Stamp
닭다리 개다리 2

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



There are 230 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



우리 안에 총 120 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 320 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 230 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 6-cent stamps are there?



오늘 8원짜리 4원짜리 우표 총 140장을 사고, 840 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 870 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?

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