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