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