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