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