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