312  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 260 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2040 cents. How many 7-cent stamps are there?



There are 120 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 550 cents. How many 5-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1130 cents. How many 7-cent stamps are there?



There are 270 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1980 cents. How many 6-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1160 cents. How many 4-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?



오늘 5원짜리 6원짜리 우표 총 120 장을 사고, 650 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 210 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1410 cents. How many 5-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

312    150 70 110 150 70 ( 550 )   80 120 70 120 110 ( 500 )   [[ 1050 ]]