980  Leg-Stamp
닭다리 개다리 2

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



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



우리 안에 총 200 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 110 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 220 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1260 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?



오늘 4원짜리 9원짜리 우표 총 190장을 사고, 1010 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 150 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?

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