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