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