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