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