Oefen met erbij en eraf tot 100
In de mix
1.
60
50
–
=
2.
20
20
+
=
3.
100
40
–
=
4.
20
60
+
=
5.
40
20
–
=
6.
80
30
–
=
7.
50
20
+
=
8.
70
20
–
=
9.
40
20
+
=
10.
40
60
+
=
11.
80
30
–
=
12.
40
30
–
=
13.
90
40
–
=
14.
90
40
–
=
15.
40
20
+
=
16.
40
20
–
=
17.
40
20
–
=
18.
50
40
+
=
19.
30
10
+
=
20.
20
0
+
=
21.
90
50
–
=
22.
20
60
+
=
23.
30
30
+
=
24.
90
50
–
=