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