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