110  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 540 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 170 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 160 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 850 cents. How many 4-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 210장을 사고, 1150 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 200 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 780 cents. How many 3-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 6-cent stamps are there?

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