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