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