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