239  Leg-Stamp
닭다리 개다리 2

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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?



우리 안에 총 120 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 340 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 280 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1420 cents. How many 6-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?



오늘 3원짜리 5원짜리 우표 총 200장을 사고, 840 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 230 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 5-cent stamps are there?

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