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