271  Leg-Stamp
닭다리 개다리 2

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There are 130 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



우리 안에 총 150 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 440 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 180 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?

There are 130 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 970 cents. How many 7-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?



오늘 5원짜리 8원짜리 우표 총 140장을 사고, 850 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1240 cents. How many 8-cent stamps are there?



There are 120 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?

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