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