Reken de erafsom tot 20 uit

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

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