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