678  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



우리 안에 총 210 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?

There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1750 cents. How many 8-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 3-cent stamps are there?



오늘 8원짜리 3원짜리 우표 총 160장을 사고, 1030 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 250 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1350 cents. How many 7-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 860 cents. How many 6-cent stamps are there?

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