821  Leg-Stamp
닭다리 개다리 2

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There are 190 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



There are 90 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 220 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 950 cents. How many 4-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 8-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 170장을 사고, 780 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1130 cents. How many 7-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 4-cent stamps are there?

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