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