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