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