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