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