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