331  Stamp
How many stamps? 2

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There are 160 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1410 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1880 cents. How many 8-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1060 cents. How many 4-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1370 cents. How many 5-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 720 cents. How many 4-cent stamps are there?



오늘 4원짜리 5원짜리 우표 총 270 장을 사고, 1200 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 160 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 780 cents. How many 4-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



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331    80 150 100 70 70 ( 470 )   130 80 150 90 150 ( 600 )   [[ 1070 ]]