Erbijsommen en erafsommen tot 100
In de mix
1.
40
30
–
=
2.
100
50
–
=
3.
20
0
+
=
4.
70
30
–
=
5.
100
60
–
=
6.
20
30
+
=
7.
100
30
–
=
8.
20
0
+
=
9.
90
10
+
=
10.
40
20
–
=
11.
40
40
+
=
12.
70
30
–
=
13.
90
40
–
=
14.
60
40
–
=
15.
70
20
+
=
16.
100
70
–
=
17.
20
60
+
=
18.
40
30
–
=
19.
20
30
+
=
20.
30
30
+
=
21.
20
20
+
=
22.
80
20
–
=
23.
20
0
+
=
24.
40
10
+
=