Oefen de erafsommen tot 20

Erafsommen
1.
15
–
10
=
2.
3
–
0
=
3.
18
–
17
=
4.
6
–
6
=
5.
6
–
4
=
6.
5
–
5
=
7.
8
–
6
=
8.
10
–
5
=
9.
20
–
19
=
10.
6
–
6
=
11.
20
–
16
=
12.
7
–
5
=
13.
8
–
3
=
14.
18
–
3
=
15.
20
–
19
=
16.
7
–
2
=
17.
7
–
7
=
18.
1
–
1
=
19.
7
–
4
=
20.
3
–
2
=
21.
15
–
6
=
22.
9
–
3
=
23.
3
–
0
=
24.
17
–
7
=
25.
7
–
0
=
26.
2
–
0
=
27.
10
–
1
=
28.
16
–
10
=
29.
19
–
6
=
30.
14
–
2
=
31.
2
–
2
=
32.
18
–
8
=
33.
15
–
11
=
34.
8
–
2
=
35.
19
–
1
=
36.
15
–
6
=
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen

Oefen de erafsommen tot 20
| ANTWOORDEN

Erafsommen
1.
15
–
10
=
5
2.
3
–
0
=
3
3.
18
–
17
=
1
4.
6
–
6
=
0
5.
6
–
4
=
2
6.
5
–
5
=
0
7.
8
–
6
=
2
8.
10
–
5
=
5
9.
20
–
19
=
1
10.
6
–
6
=
0
11.
20
–
16
=
4
12.
7
–
5
=
2
13.
8
–
3
=
5
14.
18
–
3
=
15
15.
20
–
19
=
1
16.
7
–
2
=
5
17.
7
–
7
=
0
18.
1
–
1
=
0
19.
7
–
4
=
3
20.
3
–
2
=
1
21.
15
–
6
=
9
22.
9
–
3
=
6
23.
3
–
0
=
3
24.
17
–
7
=
10
25.
7
–
0
=
7
26.
2
–
0
=
2
27.
10
–
1
=
9
28.
16
–
10
=
6
29.
19
–
6
=
13
30.
14
–
2
=
12
31.
2
–
2
=
0
32.
18
–
8
=
10
33.
15
–
11
=
4
34.
8
–
2
=
6
35.
19
–
1
=
18
36.
15
–
6
=
9
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen