Oefen erbijsommen en erafsommen tot 20
In de mix
1.
11
8
jimmy
–
=
2.
3
17
jimmy
+
=
3.
6
14
jimmy
+
=
4.
12
2
jimmy
+
=
5.
7
13
jimmy
+
=
6.
5
11
jimmy
+
=
7.
19
7
jimmy
–
=
8.
17
9
jimmy
–
=
9.
4
3
jimmy
–
=
10.
5
12
jimmy
+
=
11.
9
5
jimmy
+
=
12.
5
4
jimmy
–
=
13.
6
4
jimmy
–
=
14.
13
10
jimmy
–
=
15.
2
12
jimmy
+
=
16.
6
5
jimmy
–
=
17.
2
0
jimmy
+
=
18.
7
4
jimmy
+
=
19.
10
10
jimmy
+
=
20.
5
3
jimmy
–
=
21.
9
6
jimmy
+
=
22.
6
2
jimmy
+
=
23.
3
1
jimmy
+
=
24.
7
7
jimmy
+
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
11
8
3
–
=
2.
3
17
20
+
=
3.
6
14
20
+
=
4.
12
2
14
+
=
5.
7
13
20
+
=
6.
5
11
16
+
=
7.
19
7
12
–
=
8.
17
9
8
–
=
9.
4
3
1
–
=
10.
5
12
17
+
=
11.
9
5
14
+
=
12.
5
4
1
–
=
13.
6
4
2
–
=
14.
13
10
3
–
=
15.
2
12
14
+
=
16.
6
5
1
–
=
17.
2
0
2
+
=
18.
7
4
11
+
=
19.
10
10
20
+
=
20.
5
3
2
–
=
21.
9
6
15
+
=
22.
6
2
8
+
=
23.
3
1
4
+
=
24.
7
7
14
+
=