424  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



우리 안에 총 110 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 360 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?

There are 140 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 640 cents. How many 5-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1120 cents. How many 5-cent stamps are there?



오늘 8원짜리 4원짜리 우표 총 150장을 사고, 1000 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1320 cents. How many 5-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1010 cents. How many 7-cent stamps are there?

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