406  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 220 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



우리 안에 총 160 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 140 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 250 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 4-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



오늘 5원짜리 6원짜리 우표 총 180장을 사고, 980 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1340 cents. How many 8-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?

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