842  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 120 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1000 cents. How many 4-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1580 cents. How many 6-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 6-cent stamps are there?



오늘 4원짜리 9원짜리 우표 총 230 장을 사고, 1520 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 720 cents. How many 4-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?



+(         )

 

(         )+

++[[          ]]++

842    70 150 110 120 130 ( 580 )   80 130 110 120 140 ( 580 )   [[ 1160 ]]