643  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



우리 안에 총 120 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



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

There are 180 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1030 cents. How many 6-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1830 cents. How many 5-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 260장을 사고, 1340 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 240 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1220 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?

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