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