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