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