330  Leg-Stamp
닭다리 개다리 2

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There are 130 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



우리 안에 총 270 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 800 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 190 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?



There are 120 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 240장을 사고, 1100 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 210 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 4-cent stamps are there?

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