|
213 Stamp |
Name : _________________ |
||
|
There are 190 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1640 cents. How many 8-cent stamps are there? |
There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1320 cents. How many 8-cent stamps are there? |
|
+( ) |
|
( )+ |
|
++[[ ]]++ |
||
| 213 70 140 70 100 110 ( 490 ) 120 120 70 110 100 ( 520 ) [[ 1010 ]] | ||
|
|
||