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