Rekensommen met eraf tot 20

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

Rekensommen met eraf tot 20
| ANTWOORDEN

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