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