138  Leg-Stamp
닭다리 개다리 2

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There are 240 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 580 legs. How many chickens are there?



우리 안에 총 100 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 280 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?



오늘 3원짜리 8원짜리 우표 총 170장을 사고, 910 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 550 cents. How many 3-cent stamps are there?

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