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