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