879  Stamp
How many stamps? 2

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There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1580 cents. How many 5-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 860 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1260 cents. How many 8-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1100 cents. How many 5-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1540 cents. How many 8-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1080 cents. How many 7-cent stamps are there?



오늘 4원짜리 3원짜리 우표 총 180 장을 사고, 610 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 230 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1490 cents. How many 8-cent stamps are there?



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879    140 80 120 140 110 ( 590 )   100 120 70 130 90 ( 510 )   [[ 1100 ]]