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