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