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