645  Stamp
How many stamps? 2

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There are 170 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1080 cents. How many 6-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?



There are 280 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 2090 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 8-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 6-cent stamps are there?



오늘 5원짜리 3원짜리 우표 총 190 장을 사고, 750 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 250 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1890 cents. How many 6-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?



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645    110 70 150 150 110 ( 590 )   70 140 90 120 90 ( 510 )   [[ 1100 ]]