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