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