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