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