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