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