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