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