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