Subtraction with help

Example

70 - 46 = ?

 
7
0
=
 
+

-
4
6
 
-
4
6
 
 
 

 
 
 
 
 
 
 
 
 
 

 
=
 
 
+

Solution

70 - 46 = ?

 
7
0
=
 
5
0
+
2
0

-
4
6
 
-
4
6
 
 
 

 
 
 
 
 
 
 
 
 
 

 
2
4
=
 
 
4
+
2
0

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Subtraction with help
Subtraction with help

Number of exercises: