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