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