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