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