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