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