Rekensommen met erbij en eraf tot 50
In de mix
1.
20
5
+
=
2.
20
15
–
=
3.
40
5
+
=
4.
10
5
+
=
5.
45
35
–
=
6.
40
35
–
=
7.
25
15
–
=
8.
30
20
–
=
9.
15
20
+
=
10.
25
20
–
=
11.
15
0
+
=
12.
40
10
+
=
13.
25
25
+
=
14.
30
10
+
=
15.
20
15
–
=
16.
40
5
+
=
17.
40
25
–
=
18.
15
10
+
=
19.
15
0
+
=
20.
15
25
+
=
21.
25
15
–
=
22.
40
35
–
=
23.
25
10
+
=
24.
45
15
–
=