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