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