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