Oefen met erbij en eraf tot 100
In de mix
1.
40
20
–
=
2.
50
20
–
=
3.
20
10
+
=
4.
50
20
–
=
5.
100
60
–
=
6.
10
10
+
=
7.
60
40
–
=
8.
90
60
–
=
9.
10
10
+
=
10.
60
20
–
=
11.
40
50
+
=
12.
40
40
+
=
13.
30
10
+
=
14.
40
10
+
=
15.
40
10
+
=
16.
50
30
+
=
17.
60
30
–
=
18.
60
20
–
=
19.
60
40
+
=
20.
20
10
+
=
21.
10
10
+
=
22.
40
50
+
=
23.
40
30
–
=
24.
50
30
–
=