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