Rekensommen met erbij en eraf tot 100
In de mix
1.
50
30
–
=
2.
30
20
–
=
3.
20
0
+
=
4.
20
30
+
=
5.
60
20
–
=
6.
20
50
+
=
7.
20
60
+
=
8.
60
50
–
=
9.
60
20
–
=
10.
90
40
–
=
11.
20
10
+
=
12.
20
10
+
=
13.
70
30
–
=
14.
60
40
–
=
15.
50
40
–
=
16.
50
40
+
=
17.
90
10
+
=
18.
20
20
+
=
19.
20
40
+
=
20.
40
10
+
=
21.
20
10
+
=
22.
40
60
+
=
23.
20
40
+
=
24.
100
90
–
=