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