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