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