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