Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
3 – 0 =
2
1
4
3
|
2.
14 + 5 =
3
19
2
4
|
3.
14 + 3 =
3
17
4
2
|
4.
9 + 1 =
2
1
3
10
|
|
5.
9 + 1 =
3
10
1
2
|
6.
6 + 3 =
9
1
3
2
|
7.
19 – 0 =
4
2
19
3
|
8.
19 + 0 =
3
2
4
19
|
|
9.
10 + 0 =
1
2
10
3
|
10.
3 + 6 =
9
1
2
3
|
11.
9 + 11 =
3
20
2
4
|
12.
5 + 9 =
3
2
1
14
|
|
13.
7 – 6 =
4
3
1
2
|
14.
4 – 0 =
2
1
3
4
|
15.
18 – 15 =
4
1
3
2
|
16.
14 + 5 =
3
19
4
2
|
|
17.
3 + 6 =
9
1
3
2
|
18.
20 – 14 =
2
1
3
6
|
19.
17 + 2 =
4
2
3
19
|
20.
16 – 11 =
1
2
5
3
|