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