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