920  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 220 heads of Chickens and Dogs together. Altogether there are 680 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 160 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1550 cents. How many 6-cent stamps are there?



오늘 5원짜리 7원짜리 우표 총 180장을 사고, 1040 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 240 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1200 cents. How many 3-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1580 cents. How many 8-cent stamps are there?

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