318  Leg-Stamp
닭다리 개다리 2

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There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



우리 안에 총 230 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 640 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?

There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1150 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 8-cent stamps are there?



오늘 4원짜리 7원짜리 우표 총 270장을 사고, 1440 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 140 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 8-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1140 cents. How many 4-cent stamps are there?

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