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