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