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