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