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