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