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