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