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