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