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