Oefen de erbijsommen tot 100

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

Oefen de erbijsommen tot 100
| ANTWOORDEN

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