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