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