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