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