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