392  Leg-Stamp
닭다리 개다리 2

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There are 190 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 340 legs. How many chickens are there?



우리 안에 총 120 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 400 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 200 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



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

There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 6-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 200장을 사고, 1080 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 270 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2280 cents. How many 8-cent stamps are there?



There are 130 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 840 cents. How many 6-cent stamps are there?

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