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