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