Oefen de erbijsommen tot 20
Erbijsommen
|
1.
7 + 12 =
3
6
4
19
|
2.
18 + 2 =
6
10
20
9
|
3.
6 + 2 =
7
11
8
6
|
4.
17 + 2 =
5
19
2
6
|
|
5.
10 + 7 =
17
4
6
3
|
6.
8 + 7 =
7
4
15
6
|
7.
10 + 3 =
13
1
12
11
|
8.
2 + 0 =
3
1
2
7
|
|
9.
8 + 9 =
17
7
10
5
|
10.
7 + 4 =
13
5
15
11
|
11.
10 + 5 =
1
15
3
7
|
12.
16 + 4 =
10
5
13
20
|
|
13.
5 + 2 =
1
11
9
7
|
14.
10 + 2 =
8
14
16
12
|
15.
14 + 0 =
15
3
14
18
|
16.
9 + 5 =
14
19
10
4
|
|
17.
16 + 1 =
8
6
17
4
|
18.
18 + 2 =
1
4
20
14
|
19.
2 + 15 =
12
17
10
11
|
20.
5 + 0 =
5
3
6
4
|