885  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 600 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 70 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 200 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 160 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



There are 240 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1510 cents. How many 4-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



오늘 3원짜리 5원짜리 우표 총 210장을 사고, 850 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 140 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 770 cents. How many 4-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



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