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