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