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