445  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 280 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1100 cents. How many 3-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 5-cent stamps are there?



There are 130 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 880 cents. How many 6-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 5-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1090 cents. How many 5-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1430 cents. How many 4-cent stamps are there?



오늘 7원짜리 9원짜리 우표 총 220 장을 사고, 1740 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 180 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 8-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 7-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

445    150 120 80 150 120 ( 620 )   140 110 120 130 80 ( 580 )   [[ 1200 ]]