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