Oefen de erbijsommen tot 100

Erbijsommen
1.
10
+
90
=
80
100
90
85
2.
85
+
15
=
100
80
90
85
3.
30
+
10
=
40
45
30
50
4.
35
+
45
=
70
90
85
80
5.
10
+
55
=
55
70
75
65
6.
65
+
10
=
75
65
85
70
7.
40
+
50
=
70
80
90
75
8.
10
+
75
=
80
75
95
85
9.
35
+
25
=
50
55
70
60
10.
5
+
50
=
60
50
55
65
11.
20
+
50
=
80
70
60
75
12.
25
+
0
=
25
20
15
35
13.
60
+
0
=
50
70
60
55
14.
0
+
60
=
70
65
55
60
15.
35
+
20
=
55
60
45
65
16.
85
+
10
=
90
95
80
85
17.
55
+
15
=
70
60
65
80
18.
10
+
20
=
35
30
40
25
19.
5
+
95
=
85
100
80
95
20.
45
+
10
=
45
60
55
50
21.
90
+
10
=
85
95
100
90
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen

Oefen de erbijsommen tot 100
| ANTWOORDEN

Erbijsommen
1.
10
+
90
=
80
100
90
85
2.
85
+
15
=
100
80
90
85
3.
30
+
10
=
40
45
30
50
4.
35
+
45
=
70
90
85
80
5.
10
+
55
=
55
70
75
65
6.
65
+
10
=
75
65
85
70
7.
40
+
50
=
70
80
90
75
8.
10
+
75
=
80
75
95
85
9.
35
+
25
=
50
55
70
60
10.
5
+
50
=
60
50
55
65
11.
20
+
50
=
80
70
60
75
12.
25
+
0
=
25
20
15
35
13.
60
+
0
=
50
70
60
55
14.
0
+
60
=
70
65
55
60
15.
35
+
20
=
55
60
45
65
16.
85
+
10
=
90
95
80
85
17.
55
+
15
=
70
60
65
80
18.
10
+
20
=
35
30
40
25
19.
5
+
95
=
85
100
80
95
20.
45
+
10
=
45
60
55
50
21.
90
+
10
=
85
95
100
90
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen