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