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