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