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