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