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