Rekensommen met erbij en eraf tot 50
In de mix
1.
15
20
+
=
2.
30
5
+
=
3.
20
10
+
=
4.
50
40
–
=
5.
10
5
+
=
6.
35
15
+
=
7.
15
20
+
=
8.
35
15
+
=
9.
25
20
–
=
10.
30
20
–
=
11.
30
15
+
=
12.
25
15
+
=
13.
15
5
+
=
14.
25
20
–
=
15.
15
0
+
=
16.
25
15
–
=
17.
10
5
+
=
18.
40
30
–
=
19.
20
30
+
=
20.
25
5
+
=
21.
35
30
–
=
22.
25
15
–
=
23.
25
15
–
=
24.
45
35
–
=