|
165 Stamp |
Name : _________________ |
||
|
There are 280 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1100 cents. How many 3-cent stamps are there? |
There are 270 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1630 cents. How many 7-cent stamps are there? |
|
+( ) |
|
( )+ |
|
++[[ ]]++ |
||
| 165 150 130 140 130 110 ( 660 ) 140 150 100 80 150 ( 620 ) [[ 1280 ]] | ||
|
|
||