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