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