170  Leg-Stamp
닭다리 개다리 2

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There are 230 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



우리 안에 총 90 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 240 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 180 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?

There are 160 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 910 cents. How many 4-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1420 cents. How many 6-cent stamps are there?



오늘 8원짜리 6원짜리 우표 총 200장을 사고, 1460 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 250 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 8-cent stamps are there?

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