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