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