638  Stamp
How many stamps? 2

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There are 230 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1960 cents. How many 8-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 600 cents. How many 4-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1720 cents. How many 5-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



오늘 3원짜리 9원짜리 우표 총 230 장을 사고, 1410 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 150 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1020 cents. How many 8-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 940 cents. How many 4-cent stamps are there?



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638    110 90 100 140 80 ( 520 )   110 150 110 90 110 ( 570 )   [[ 1090 ]]