242  Leg-Stamp
닭다리 개다리 2

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There are 150 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



우리 안에 총 180 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 460 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 210 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 230 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1200 cents. How many 3-cent stamps are there?



오늘 6원짜리 8원짜리 우표 총 250장을 사고, 1740 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 170 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 710 cents. How many 3-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?

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242    40 90 90 130 120 ( 470 )   110 80 80 120 130 ( 520 )   [[ 990 ]]