Snelle erbijsommen en erafsommen tot 50
In de mix
1.
30
25
–
=
2.
15
5
+
=
3.
20
30
+
=
4.
10
5
+
=
5.
15
20
+
=
6.
15
5
+
=
7.
15
20
+
=
8.
15
5
+
=
9.
15
25
+
=
10.
20
15
+
=
11.
45
35
–
=
12.
20
5
+
=
13.
15
0
+
=
14.
30
15
–
=
15.
45
35
–
=
16.
10
5
+
=
17.
10
5
+
=
18.
15
10
+
=
19.
25
15
–
=
20.
35
30
–
=
21.
30
25
–
=
22.
50
35
–
=
23.
30
25
–
=
24.
15
5
+
=