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