852  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 160 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?

There are 160 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1200 cents. How many 8-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1160 cents. How many 3-cent stamps are there?



오늘 7원짜리 4원짜리 우표 총 220장을 사고, 1270 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 270 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 3-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 6-cent stamps are there?

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