820  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



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



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 340 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 160 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?

There are 260 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?



오늘 7원짜리 8원짜리 우표 총 190장을 사고, 1410 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 190 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1120 cents. How many 3-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1880 cents. How many 7-cent stamps are there?

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