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