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