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