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