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