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