369  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



우리 안에 총 220 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 700 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 190 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?

There are 150 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 900 cents. How many 7-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1340 cents. How many 8-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 130장을 사고, 860 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 230 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1640 cents. How many 8-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?

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