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