490  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1110 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 230 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 4-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 6-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 8-cent stamps are there?



오늘 8원짜리 5원짜리 우표 총 250 장을 사고, 1610 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 140 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 490 cents. How many 3-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

490    100 120 110 110 110 ( 550 )   70 130 120 70 130 ( 520 )   [[ 1070 ]]