405  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 340 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 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?

There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1030 cents. How many 5-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 6-cent stamps are there?



오늘 8원짜리 5원짜리 우표 총 150장을 사고, 990 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1620 cents. How many 5-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?

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