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