Oefen de erbijsommen tot 20

Erbijsommen
1.
20 + 0 =
2.
11 + 7 =
3.
18 + 1 =
4.
7 + 7 =
5.
9 + 0 =
6.
17 + 0 =
7.
17 + 2 =
8.
2 + 8 =
9.
1 + 1 =
10.
4 + 1 =
11.
7 + 3 =
12.
4 + 10 =
13.
5 + 5 =
14.
10 + 7 =
15.
20 + 0 =
16.
7 + 4 =
17.
6 + 8 =
18.
15 + 2 =
19.
1 + 13 =
20.
6 + 0 =
21.
15 + 1 =
22.
7 + 1 =
23.
13 + 0 =
24.
10 + 3 =
25.
12 + 5 =
26.
4 + 15 =
27.
20 + 0 =
28.
4 + 9 =
29.
13 + 7 =
30.
15 + 2 =
31.
9 + 10 =
32.
2 + 1 =
33.
17 + 1 =

Oefen de erbijsommen tot 20
| ANTWOORDEN

Erbijsommen
1.
20 + 0 =
20
2.
11 + 7 =
18
3.
18 + 1 =
19
4.
7 + 7 =
14
5.
9 + 0 =
9
6.
17 + 0 =
17
7.
17 + 2 =
19
8.
2 + 8 =
10
9.
1 + 1 =
2
10.
4 + 1 =
5
11.
7 + 3 =
10
12.
4 + 10 =
14
13.
5 + 5 =
10
14.
10 + 7 =
17
15.
20 + 0 =
20
16.
7 + 4 =
11
17.
6 + 8 =
14
18.
15 + 2 =
17
19.
1 + 13 =
14
20.
6 + 0 =
6
21.
15 + 1 =
16
22.
7 + 1 =
8
23.
13 + 0 =
13
24.
10 + 3 =
13
25.
12 + 5 =
17
26.
4 + 15 =
19
27.
20 + 0 =
20
28.
4 + 9 =
13
29.
13 + 7 =
20
30.
15 + 2 =
17
31.
9 + 10 =
19
32.
2 + 1 =
3
33.
17 + 1 =
18