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