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