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