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