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