418  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



우리 안에 총 230 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 720 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 100 heads of Chickens and Dogs together. Altogether there are 320 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?

There are 260 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1040 cents. How many 3-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 5-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 170장을 사고, 790 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1370 cents. How many 5-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 6-cent stamps are there?

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