530  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 600 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 240 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?

There are 270 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 6-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2050 cents. How many 8-cent stamps are there?



오늘 3원짜리 6원짜리 우표 총 200장을 사고, 990 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 170 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 7-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 8-cent stamps are there?

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