Oefen de erbijsommen tot 100

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

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