269  Leg-Stamp
닭다리 개다리 2

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There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



우리 안에 총 210 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 240 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?



There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?

There are 130 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 850 cents. How many 7-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1250 cents. How many 4-cent stamps are there?



오늘 6원짜리 9원짜리 우표 총 180장을 사고, 1230 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 250 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 970 cents. How many 3-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 970 cents. How many 5-cent stamps are there?

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