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