|
258 Stamp |
Name : _________________ |
||
|
There are 150 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 670 cents. How many 5-cent stamps are there? |
There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1670 cents. How many 7-cent stamps are there? |
|
+( ) |
|
( )+ |
|
++[[ ]]++ |
||
| 258 70 100 110 150 100 ( 530 ) 110 120 150 110 150 ( 640 ) [[ 1170 ]] | ||
|
|
||