601  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 740 cents. How many 4-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 510 cents. How many 3-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 770 cents. How many 5-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 770 cents. How many 3-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1210 cents. How many 5-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 200 장을 사고, 1670 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 160 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1170 cents. How many 7-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 5-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

601    110 70 100 70 70 ( 420 )   130 110 130 110 90 ( 570 )   [[ 990 ]]