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