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