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