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