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