907  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 620 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 170 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



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

There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1600 cents. How many 7-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



오늘 4원짜리 3원짜리 우표 총 210장을 사고, 740 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 180 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1080 cents. How many 5-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 880 cents. How many 6-cent stamps are there?

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