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