Rekensommen met erbij en eraf tot 50
In de mix
1.
25
15
–
=
2.
20
25
+
=
3.
20
15
–
=
4.
50
15
–
=
5.
30
10
+
=
6.
15
10
+
=
7.
30
10
+
=
8.
15
5
+
=
9.
10
5
+
=
10.
50
40
–
=
11.
25
20
–
=
12.
35
5
+
=
13.
25
25
+
=
14.
15
15
+
=
15.
20
15
–
=
16.
15
25
+
=
17.
35
15
–
=
18.
15
25
+
=
19.
30
15
+
=
20.
30
25
–
=
21.
10
5
+
=
22.
35
15
+
=
23.
25
15
–
=
24.
15
20
+
=