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