387  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1540 cents. How many 8-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 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1350 cents. How many 7-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1460 cents. How many 5-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1290 cents. How many 8-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 880 cents. How many 4-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1150 cents. How many 4-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 8-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

387    110 70 70 130 90 ( 470 )   100 80 80 130 90 ( 480 )   [[ 950 ]]