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