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