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