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