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