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