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