306  Leg-Stamp
닭다리 개다리 2

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There are 110 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?

There are 220 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1260 cents. How many 7-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 150장을 사고, 1270 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1360 cents. How many 5-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1260 cents. How many 6-cent stamps are there?

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