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