Snelle erbijsommen en erafsommen tot 50
In de mix
1.
20
5
+
=
2.
35
25
–
=
3.
40
15
–
=
4.
15
5
+
=
5.
50
15
–
=
6.
30
15
–
=
7.
35
25
–
=
8.
35
20
–
=
9.
15
5
+
=
10.
25
20
–
=
11.
30
5
+
=
12.
45
20
–
=
13.
35
15
–
=
14.
40
15
–
=
15.
25
10
+
=
16.
15
35
+
=
17.
10
5
+
=
18.
20
15
+
=
19.
15
5
+
=
20.
30
10
+
=
21.
20
5
+
=
22.
40
10
+
=
23.
50
40
–
=
24.
30
15
–
=