344  Stamp
How many stamps? 2

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There are 160 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 880 cents. How many 4-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1410 cents. How many 7-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 3-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 5-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?



오늘 3원짜리 9원짜리 우표 총 210 장을 사고, 1110 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 830 cents. How many 6-cent stamps are there?



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344    80 150 120 70 70 ( 490 )   130 130 130 110 80 ( 580 )   [[ 1070 ]]