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