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