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