Subtraction with help

During subtraction we write subtrahend under minuend, and the result below the line.

Ukázka úlohy

70 - 21 = ?

 
7
0
=
 
+

-
2
1
 
-
2
1
 
 
 

 
 
 
 
 
 
 
 
 
 

 
=
 
 
+

Řešení úlohy

70 - 21 = ?

 
7
0
=
 
3
0
+
4
0

-
2
1
 
-
2
1
 
 
 

 
 
 
 
 
 
 
 
 
 

 
4
9
=
 
 
9
+
4
0

домой
домой
Subtraction with help
Subtraction with help

Počet úloh: