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