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