Oefen de erafsommen tot 20
Erafsommen
|
1.
5 – 3 =
1
4
7
2
|
2.
5 – 4 =
2
4
1
5
|
3.
8 – 5 =
4
8
3
6
|
4.
17 – 8 =
7
9
4
12
|
|
5.
9 – 7 =
7
1
3
2
|
6.
12 – 9 =
4
3
8
6
|
7.
7 – 6 =
2
1
3
4
|
8.
4 – 3 =
5
4
2
1
|
|
9.
8 – 6 =
1
6
2
3
|
10.
17 – 16 =
2
5
3
1
|
11.
3 – 2 =
6
1
2
3
|
12.
3 – 0 =
6
1
5
3
|
|
13.
2 – 2 =
2
3
5
0
|
14.
20 – 1 =
13
12
19
2
|
15.
4 – 0 =
4
2
9
8
|
16.
5 – 4 =
3
4
2
1
|
|
17.
18 – 17 =
5
4
6
1
|
18.
8 – 2 =
2
6
3
1
|
19.
12 – 8 =
4
5
9
1
|
20.
17 – 17 =
0
2
5
3
|