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