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