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