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