Reken de erafsom tot 20 uit

Erafsommen
1.
8
–
5
=
2.
5
–
4
=
3.
14
–
13
=
4.
18
–
14
=
5.
10
–
5
=
6.
4
–
1
=
7.
10
–
4
=
8.
14
–
13
=
9.
20
–
5
=
10.
13
–
10
=
11.
18
–
1
=
12.
15
–
0
=
13.
14
–
2
=
14.
13
–
6
=
15.
18
–
1
=
16.
16
–
2
=
17.
5
–
3
=
18.
18
–
2
=
19.
9
–
2
=
20.
11
–
8
=
21.
5
–
1
=
22.
17
–
1
=
23.
16
–
0
=
24.
17
–
3
=
25.
16
–
13
=
26.
1
–
0
=
27.
3
–
2
=
28.
15
–
4
=
29.
2
–
0
=
30.
9
–
4
=
31.
18
–
17
=
32.
12
–
4
=
33.
17
–
15
=
34.
6
–
5
=
35.
11
–
7
=
36.
10
–
1
=
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Reken de erafsom tot 20 uit
| ANTWOORDEN

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