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