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