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