Reken de erafsom tot 20 uit

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

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