101  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 280 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 2110 cents. How many 8-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 890 cents. How many 5-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 7-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1420 cents. How many 8-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1230 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



오늘 5원짜리 7원짜리 우표 총 210 장을 사고, 1230 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 180 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

101    150 130 120 90 110 ( 600 )   120 130 120 120 140 ( 630 )   [[ 1230 ]]