782  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 250 heads of Chickens and Dogs together. Altogether there are 740 legs. How many chickens are there?



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 340 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 200 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 150 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 510 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 7-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 170장을 사고, 790 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 220 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1270 cents. How many 4-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?

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