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