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