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