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