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