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