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