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