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