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