399  Leg-Stamp
닭다리 개다리 2

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There are 160 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 540 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 180 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 240 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 3-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



오늘 4원짜리 9원짜리 우표 총 200장을 사고, 1200 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 190 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1630 cents. How many 8-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 470 cents. How many 4-cent stamps are there?

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