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