Oefen de erbijsommen tot 50
Erbijsommen
1.
0
+
40
=
35
40
20
25
2.
35
+
10
=
35
40
25
45
3.
5
+
40
=
45
30
25
40
4.
10
+
25
=
45
25
30
35
5.
5
+
10
=
15
5
25
20
6.
10
+
40
=
35
45
50
30
7.
0
+
40
=
20
30
35
40
8.
20
+
0
=
15
20
10
30
9.
5
+
20
=
20
30
35
25
10.
20
+
15
=
25
45
30
35
11.
30
+
5
=
45
30
35
25
12.
5
+
25
=
20
35
40
30
13.
5
+
45
=
35
45
50
30
14.
45
+
0
=
25
45
35
40
15.
0
+
45
=
25
40
45
35
16.
45
+
5
=
40
45
50
35
17.
5
+
40
=
40
30
25
45
18.
5
+
0
=
5
25
15
10
19.
10
+
35
=
40
45
35
25
20.
15
+
15
=
25
20
30
35
21.
25
+
10
=
45
40
30
35
Oefen de erbijsommen tot 50
| ANTWOORDEN
Erbijsommen
1.
0
+
40
=
35
40
20
25
2.
35
+
10
=
35
40
25
45
3.
5
+
40
=
45
30
25
40
4.
10
+
25
=
45
25
30
35
5.
5
+
10
=
15
5
25
20
6.
10
+
40
=
35
45
50
30
7.
0
+
40
=
20
30
35
40
8.
20
+
0
=
15
20
10
30
9.
5
+
20
=
20
30
35
25
10.
20
+
15
=
25
45
30
35
11.
30
+
5
=
45
30
35
25
12.
5
+
25
=
20
35
40
30
13.
5
+
45
=
35
45
50
30
14.
45
+
0
=
25
45
35
40
15.
0
+
45
=
25
40
45
35
16.
45
+
5
=
40
45
50
35
17.
5
+
40
=
40
30
25
45
18.
5
+
0
=
5
25
15
10
19.
10
+
35
=
40
45
35
25
20.
15
+
15
=
25
20
30
35
21.
25
+
10
=
45
40
30
35