396  Leg-Stamp
닭다리 개다리 2

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There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 420 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 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 5-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 530 cents. How many 5-cent stamps are there?



오늘 6원짜리 3원짜리 우표 총 240장을 사고, 1140 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1540 cents. How many 8-cent stamps are there?

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