Oplossen van erafsommen tot 20
Erafsommen
|
1.
7 – 7 =
5
3
4
0
|
2.
17 – 9 =
11
8
2
6
|
3.
11 – 8 =
5
7
3
6
|
4.
10 – 7 =
4
5
8
3
|
|
5.
8 – 1 =
2
3
1
7
|
6.
13 – 8 =
1
4
6
5
|
7.
19 – 15 =
8
4
2
3
|
8.
9 – 0 =
3
6
9
13
|
|
9.
16 – 13 =
4
3
2
6
|
10.
20 – 4 =
13
1
16
15
|
11.
10 – 6 =
5
9
4
1
|
12.
20 – 9 =
3
2
11
9
|
|
13.
20 – 3 =
5
2
22
17
|
14.
2 – 0 =
7
1
3
2
|
15.
16 – 10 =
6
10
3
7
|
16.
12 – 5 =
11
10
7
6
|
|
17.
4 – 4 =
5
3
4
0
|
18.
20 – 7 =
9
8
13
5
|
19.
13 – 13 =
4
0
1
3
|
20.
15 – 11 =
7
4
9
2
|