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