506  Stamp
How many stamps? 2

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There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1400 cents. How many 5-cent stamps are there?



There are 260 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1530 cents. How many 8-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 5-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1740 cents. How many 8-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?



오늘 7원짜리 8원짜리 우표 총 170 장을 사고, 1240 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 8-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1360 cents. How many 4-cent stamps are there?



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506    100 150 70 120 150 ( 590 )   70 90 120 70 80 ( 430 )   [[ 1020 ]]