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