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