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