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