Oefen de erbijsom en erafsom tot 20
In de mix
|
1.
9 + 5 =
14
1
|
2.
19 – 5 =
1
14
|
3.
3 – 3 =
2
0
|
4.
19 – 4 =
15
1
|
|
5.
7 – 3 =
1
4
|
6.
7 + 13 =
20
2
|
7.
16 + 4 =
2
20
|
8.
14 – 2 =
12
1
|
|
9.
7 + 11 =
18
2
|
10.
17 + 3 =
20
2
|
11.
17 – 17 =
2
0
|
12.
15 – 11 =
1
4
|
|
13.
7 + 4 =
11
1
|
14.
18 – 11 =
1
7
|
15.
9 + 6 =
15
1
|
16.
7 – 0 =
1
7
|
|
17.
11 + 8 =
2
19
|
18.
17 + 0 =
2
17
|
19.
2 + 7 =
1
9
|
20.
7 – 2 =
1
5
|