Odpowiedź:
b) 2 + = + = + = = 2
5 - = 5 - = 5
12 - 6 = 12 - 6 = 6
4 + 5 = 4 + 5 = 9
Zadanie 3
e) - = - =
f ) - = - = = 1
g) 3 - = - = - = = 3
h) 5 - 1 = - = - = = 4
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Odpowiedź:
b) 2
+
=
+
=
+
=
= 2 
5
-
= 5
-
= 5 
12
- 6
= 12
- 6
= 6 
4
+ 5
= 4
+ 5
= 9 
Zadanie 3
e)
-
=
-
= 
f )
-
=
-
=
= 1 
g) 3
-
=
-
=
-
=
= 3 
h) 5
- 1
=
-
=
-
=
= 4 