Oefen erbijsommen en erafsommen tot 20
In de mix
1.
2
7
jimmy
+
=
2.
2
2
jimmy
+
=
3.
7
4
jimmy
–
=
4.
2
2
jimmy
+
=
5.
4
6
jimmy
+
=
6.
3
2
jimmy
–
=
7.
16
13
jimmy
–
=
8.
14
11
jimmy
–
=
9.
5
3
jimmy
–
=
10.
18
17
jimmy
–
=
11.
20
13
jimmy
–
=
12.
11
2
jimmy
–
=
13.
12
4
jimmy
–
=
14.
6
3
jimmy
+
=
15.
16
3
jimmy
+
=
16.
8
7
jimmy
–
=
17.
19
13
jimmy
–
=
18.
2
16
jimmy
+
=
19.
9
6
jimmy
–
=
20.
14
9
jimmy
–
=
21.
5
2
jimmy
–
=
22.
6
3
jimmy
–
=
23.
14
10
jimmy
–
=
24.
6
5
jimmy
–
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
2
7
9
+
=
2.
2
2
4
+
=
3.
7
4
3
–
=
4.
2
2
4
+
=
5.
4
6
10
+
=
6.
3
2
1
–
=
7.
16
13
3
–
=
8.
14
11
3
–
=
9.
5
3
2
–
=
10.
18
17
1
–
=
11.
20
13
7
–
=
12.
11
2
9
–
=
13.
12
4
8
–
=
14.
6
3
9
+
=
15.
16
3
19
+
=
16.
8
7
1
–
=
17.
19
13
6
–
=
18.
2
16
18
+
=
19.
9
6
3
–
=
20.
14
9
5
–
=
21.
5
2
3
–
=
22.
6
3
3
–
=
23.
14
10
4
–
=
24.
6
5
1
–
=