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