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