102  Leg-Stamp
닭다리 개다리 2

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



There are 100 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



우리 안에 총 200 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 3-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?



오늘 4원짜리 7원짜리 우표 총 190장을 사고, 1000 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 260 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 910 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1540 cents. How many 7-cent stamps are there?

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