219  Leg-Stamp
닭다리 개다리 2

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There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



우리 안에 총 210 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 190 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?

There are 160 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 680 cents. How many 5-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2100 cents. How many 8-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 200장을 사고, 1120 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1320 cents. How many 7-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1140 cents. How many 7-cent stamps are there?

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