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