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