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