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