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