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