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