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