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