Rekensommen met eraf tot 20

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

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