975  Leg-Stamp
닭다리 개다리 2

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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?



우리 안에 총 240 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 740 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 210 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?

There are 140 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 710 cents. How many 4-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?



오늘 3원짜리 8원짜리 우표 총 190장을 사고, 870 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 140 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 610 cents. How many 4-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 5-cent stamps are there?

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