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