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