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