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