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