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