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