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