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