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