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