Rekensommen met erbij en eraf tot 100
In de mix
1.
50
30
–
=
2.
40
30
–
=
3.
30
20
+
=
4.
30
30
+
=
5.
70
20
+
=
6.
60
40
+
=
7.
40
20
–
=
8.
70
10
+
=
9.
90
60
–
=
10.
100
80
–
=
11.
40
50
+
=
12.
30
40
+
=
13.
40
20
+
=
14.
80
70
–
=
15.
90
50
–
=
16.
20
30
+
=
17.
90
40
–
=
18.
40
20
–
=
19.
20
20
+
=
20.
70
10
+
=
21.
10
10
+
=
22.
50
30
–
=
23.
50
30
–
=
24.
20
0
+
=