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