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