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