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