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