Oplossen van erafsommen tot 20
Erafsommen
|
1.
1 – 1 =
1
4
0
2
|
2.
5 – 2 =
3
6
4
1
|
3.
7 – 7 =
4
3
1
0
|
4.
17 – 13 =
4
8
1
6
|
|
5.
20 – 8 =
3
13
12
7
|
6.
15 – 6 =
1
5
2
9
|
7.
17 – 16 =
1
2
4
5
|
8.
15 – 9 =
7
10
4
6
|
|
9.
16 – 0 =
21
6
16
1
|
10.
14 – 2 =
14
5
12
13
|
11.
17 – 4 =
13
11
8
17
|
12.
9 – 1 =
2
8
1
13
|
|
13.
1 – 0 =
5
3
1
6
|
14.
14 – 9 =
5
3
2
10
|
15.
16 – 6 =
3
13
5
10
|
16.
6 – 1 =
1
5
8
4
|
|
17.
20 – 7 =
13
9
18
1
|
18.
16 – 1 =
15
19
5
3
|
19.
10 – 2 =
4
8
6
9
|
20.
17 – 6 =
14
11
2
16
|