Oplossen van erafsommen tot 20
Erafsommen
|
1.
18 – 1 =
21
17
1
5
|
2.
10 – 3 =
3
7
5
4
|
3.
12 – 2 =
1
7
10
15
|
4.
13 – 11 =
1
2
5
6
|
|
5.
14 – 6 =
13
8
11
10
|
6.
5 – 2 =
7
5
3
6
|
7.
13 – 11 =
6
2
3
7
|
8.
10 – 8 =
2
6
7
3
|
|
9.
20 – 1 =
6
4
23
19
|
10.
19 – 11 =
5
8
4
3
|
11.
19 – 12 =
3
5
7
8
|
12.
17 – 17 =
5
0
3
2
|
|
13.
18 – 1 =
10
17
5
7
|
14.
6 – 4 =
4
5
2
3
|
15.
6 – 4 =
5
4
3
2
|
16.
16 – 11 =
3
6
1
5
|
|
17.
15 – 14 =
1
5
3
2
|
18.
11 – 1 =
13
12
10
1
|
19.
17 – 8 =
12
9
10
13
|
20.
16 – 3 =
1
4
13
3
|