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