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