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