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