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