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