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