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