Rules for the exercise

1/5

Subtraction with help

Instructions:

Subtract one number from another to get the result.

51 - 12 = ?

 
5
1
=
 
+

-
1
2
 
-
1
2
 
 
 

 
 
 
 
 
 
 
 
 
 

 
=
 
 
+