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