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