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